Merge branch 'master' of git://sourceware.org/git/glibc into upstreamupstream

43 files changed, 140 insertions, 84 deletions

diff --git a/manual/examples/add.c b/manual/examples/add.c
index 88d3e3d5f7..d9f9dae139 100644
--- a/manual/examples/add.c
+++ b/manual/examples/add.c
@@ -1,5 +1,5 @@
 /* Example of a Variadic Function
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdarg.h>
diff --git a/manual/examples/argp-ex1.c b/manual/examples/argp-ex1.c
index 900af1aec9..68852051ef 100644
--- a/manual/examples/argp-ex1.c
+++ b/manual/examples/argp-ex1.c
@@ -1,5 +1,5 @@
 /* Argp example #1 -- a minimal program using argp
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /* This is (probably) the smallest possible program that
diff --git a/manual/examples/argp-ex2.c b/manual/examples/argp-ex2.c
index 2465d418a8..450745c71d 100644
--- a/manual/examples/argp-ex2.c
+++ b/manual/examples/argp-ex2.c
@@ -1,5 +1,5 @@
 /* Argp example #2 -- a pretty minimal program using argp
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /* This program doesn't use any options or arguments, but uses
diff --git a/manual/examples/argp-ex3.c b/manual/examples/argp-ex3.c
index efec8e8507..3a73d761fa 100644
--- a/manual/examples/argp-ex3.c
+++ b/manual/examples/argp-ex3.c
@@ -1,5 +1,5 @@
 /* Argp example #3 -- a program with options and arguments using argp
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /* This program uses the same features as example 2, and uses options and
diff --git a/manual/examples/argp-ex4.c b/manual/examples/argp-ex4.c
index f560e38bfb..76bcdeaaf4 100644
--- a/manual/examples/argp-ex4.c
+++ b/manual/examples/argp-ex4.c
@@ -1,5 +1,5 @@
 /* Argp example #4 -- a program with somewhat more complicated options
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /* This program uses the same features as example 3, but has more
diff --git a/manual/examples/atexit.c b/manual/examples/atexit.c
index 718651e8bd..f8ebdd9783 100644
--- a/manual/examples/atexit.c
+++ b/manual/examples/atexit.c
@@ -1,5 +1,5 @@
 /* Cleanups on Exit
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/db.c b/manual/examples/db.c
index 93602dece5..22fbb672c3 100644
--- a/manual/examples/db.c
+++ b/manual/examples/db.c
@@ -1,5 +1,5 @@
 /* User and Group Database Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <grp.h>
diff --git a/manual/examples/dir.c b/manual/examples/dir.c
index f9d314a780..c869a1b871 100644
--- a/manual/examples/dir.c
+++ b/manual/examples/dir.c
@@ -1,5 +1,5 @@
 /* Simple Program to List a Directory
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/
diff --git a/manual/examples/dir2.c b/manual/examples/dir2.c
index 1403bb4ea9..0f3f224132 100644
--- a/manual/examples/dir2.c
+++ b/manual/examples/dir2.c
@@ -1,5 +1,5 @@
 /* Simple Program to List a Directory, Mark II
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/
diff --git a/manual/examples/execinfo.c b/manual/examples/execinfo.c
index 112134a70e..7526d5a0e7 100644
--- a/manual/examples/execinfo.c
+++ b/manual/examples/execinfo.c
@@ -1,5 +1,5 @@
 /* Obtain a backtrace and print it.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <execinfo.h>
diff --git a/manual/examples/filecli.c b/manual/examples/filecli.c
index dcdb82590d..094dd216cb 100644
--- a/manual/examples/filecli.c
+++ b/manual/examples/filecli.c
@@ -1,5 +1,5 @@
 /* Example of Reading Datagrams
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/filesrv.c b/manual/examples/filesrv.c
index 7d9f507be2..3dc0df3138 100644
--- a/manual/examples/filesrv.c
+++ b/manual/examples/filesrv.c
@@ -1,5 +1,5 @@
 /* Datagram Socket Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/fmtmsgexpl.c b/manual/examples/fmtmsgexpl.c
index 8c1e058204..e7089a52ec 100644
--- a/manual/examples/fmtmsgexpl.c
+++ b/manual/examples/fmtmsgexpl.c
@@ -1,5 +1,5 @@
 /* How to use fmtmsg and addseverity.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <fmtmsg.h>
diff --git a/manual/examples/genpass.c b/manual/examples/genpass.c
index 23d20789fc..faba2a1f3e 100644
--- a/manual/examples/genpass.c
+++ b/manual/examples/genpass.c
@@ -1,5 +1,5 @@
 /* Encrypting Passwords
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/inetcli.c b/manual/examples/inetcli.c
index bcc060b7ca..685f49bc20 100644
--- a/manual/examples/inetcli.c
+++ b/manual/examples/inetcli.c
@@ -1,5 +1,5 @@
 /* Byte Stream Socket Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/inetsrv.c b/manual/examples/inetsrv.c
index ea590fe7b8..85788dc333 100644
--- a/manual/examples/inetsrv.c
+++ b/manual/examples/inetsrv.c
@@ -1,5 +1,5 @@
 /* Byte Stream Connection Server Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/isockad.c b/manual/examples/isockad.c
index 4a55e7a696..7b0261c626 100644
--- a/manual/examples/isockad.c
+++ b/manual/examples/isockad.c
@@ -1,5 +1,5 @@
 /* Internet Socket Example using sockaddr_in.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/longopt.c b/manual/examples/longopt.c
index 4f33d52558..f776957534 100644
--- a/manual/examples/longopt.c
+++ b/manual/examples/longopt.c
@@ -1,5 +1,5 @@
 /* Example of Parsing Long Options with getopt_long.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/memopen.c b/manual/examples/memopen.c
index 7ffd06b3eb..4c35a09ed5 100644
--- a/manual/examples/memopen.c
+++ b/manual/examples/memopen.c
@@ -1,5 +1,5 @@
 /* String Streams
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/memstrm.c b/manual/examples/memstrm.c
index 65147c8734..8359c59a44 100644
--- a/manual/examples/memstrm.c
+++ b/manual/examples/memstrm.c
@@ -1,5 +1,5 @@
 /* open_memstream example.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/mkdirent.c b/manual/examples/mkdirent.c
index cb19c1f3cc..871f27fdca 100644
--- a/manual/examples/mkdirent.c
+++ b/manual/examples/mkdirent.c
@@ -1,5 +1,5 @@
 /* Example for creating a struct dirent object for use with glob.
-   Copyright (C) 2016-2018 Free Software Foundation, Inc.
+   Copyright (C) 2016-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <dirent.h>
diff --git a/manual/examples/mkfsock.c b/manual/examples/mkfsock.c
index ebce75f4bf..4372225103 100644
--- a/manual/examples/mkfsock.c
+++ b/manual/examples/mkfsock.c
@@ -1,5 +1,5 @@
 /* Example of Local-Namespace Sockets
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stddef.h>
diff --git a/manual/examples/mkisock.c b/manual/examples/mkisock.c
index 1a13c54271..171c64a634 100644
--- a/manual/examples/mkisock.c
+++ b/manual/examples/mkisock.c
@@ -1,5 +1,5 @@
 /* Internet Socket Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/mygetpass.c b/manual/examples/mygetpass.c
index 3f465ac8ea..2896860528 100644
--- a/manual/examples/mygetpass.c
+++ b/manual/examples/mygetpass.c
@@ -1,5 +1,5 @@
 /* Reading passphrases manually.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <termios.h>
diff --git a/manual/examples/ofdlocks.c b/manual/examples/ofdlocks.c
index d6b30d68b2..c2b5e5c047 100644
--- a/manual/examples/ofdlocks.c
+++ b/manual/examples/ofdlocks.c
@@ -1,5 +1,5 @@
 /* Open File Description Locks Usage Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #define _GNU_SOURCE
diff --git a/manual/examples/pipe.c b/manual/examples/pipe.c
index 25fed7f754..b5ecab21ca 100644
--- a/manual/examples/pipe.c
+++ b/manual/examples/pipe.c
@@ -1,5 +1,5 @@
 /* Creating a Pipe
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <sys/types.h>
diff --git a/manual/examples/popen.c b/manual/examples/popen.c
index 566dbf3918..9bcc27696d 100644
--- a/manual/examples/popen.c
+++ b/manual/examples/popen.c
@@ -1,5 +1,5 @@
 /* Pipe to a Subprocess
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/rprintf.c b/manual/examples/rprintf.c
index 917db0866a..ee28830c0c 100644
--- a/manual/examples/rprintf.c
+++ b/manual/examples/rprintf.c
@@ -1,5 +1,5 @@
 /* Printf Extension Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/search.c b/manual/examples/search.c
index 624cf50290..7c648641dd 100644
--- a/manual/examples/search.c
+++ b/manual/examples/search.c
@@ -1,5 +1,5 @@
 /* Searching and Sorting Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdlib.h>
diff --git a/manual/examples/select.c b/manual/examples/select.c
index 2a92d5358f..2e968d7f36 100644
--- a/manual/examples/select.c
+++ b/manual/examples/select.c
@@ -1,5 +1,5 @@
 /* Waiting for Input or Output
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/
diff --git a/manual/examples/setjmp.c b/manual/examples/setjmp.c
index cc9ccc7663..105944c185 100644
--- a/manual/examples/setjmp.c
+++ b/manual/examples/setjmp.c
@@ -1,5 +1,5 @@
 /* Introduction to Non-Local Exits
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <setjmp.h>
diff --git a/manual/examples/sigh1.c b/manual/examples/sigh1.c
index 9fe0fd2394..2385b7a55f 100644
--- a/manual/examples/sigh1.c
+++ b/manual/examples/sigh1.c
@@ -1,5 +1,5 @@
 /* Signal Handlers that Return
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <signal.h>
diff --git a/manual/examples/sigusr.c b/manual/examples/sigusr.c
index 7dfb4cf251..7d6f450dd1 100644
--- a/manual/examples/sigusr.c
+++ b/manual/examples/sigusr.c
@@ -1,5 +1,5 @@
 /* Using kill for Communication
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/
diff --git a/manual/examples/stpcpy.c b/manual/examples/stpcpy.c
index ab0befdf58..5c53920a63 100644
--- a/manual/examples/stpcpy.c
+++ b/manual/examples/stpcpy.c
@@ -1,5 +1,5 @@
 /* stpcpy example.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <string.h>
diff --git a/manual/examples/strdupa.c b/manual/examples/strdupa.c
index 7dc4180cf1..085dc2470d 100644
--- a/manual/examples/strdupa.c
+++ b/manual/examples/strdupa.c
@@ -1,5 +1,5 @@
 /* strdupa example.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <paths.h>
diff --git a/manual/examples/strftim.c b/manual/examples/strftim.c
index 2b7e48a1c9..20492aa281 100644
--- a/manual/examples/strftim.c
+++ b/manual/examples/strftim.c
@@ -1,5 +1,5 @@
 /* Time Functions Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <time.h>
diff --git a/manual/examples/subopt.c b/manual/examples/subopt.c
index a3fba4b537..c6d0a1fcf8 100644
--- a/manual/examples/subopt.c
+++ b/manual/examples/subopt.c
@@ -1,5 +1,5 @@
 /* Parsing of Suboptions Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/swapcontext.c b/manual/examples/swapcontext.c
index d0b7b2b374..70c57445f3 100644
--- a/manual/examples/swapcontext.c
+++ b/manual/examples/swapcontext.c
@@ -1,5 +1,5 @@
 /* Complete Context Control
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <signal.h>
diff --git a/manual/examples/termios.c b/manual/examples/termios.c
index e4e5a5540c..5e0dfccc09 100644
--- a/manual/examples/termios.c
+++ b/manual/examples/termios.c
@@ -1,5 +1,5 @@
 /* Noncanonical Mode Example
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <unistd.h>
diff --git a/manual/examples/testopt.c b/manual/examples/testopt.c
index 6249f2a2ed..ea2111540b 100644
--- a/manual/examples/testopt.c
+++ b/manual/examples/testopt.c
@@ -1,5 +1,5 @@
 /* Example of Parsing Arguments with getopt.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /*@group*/
diff --git a/manual/examples/testpass.c b/manual/examples/testpass.c
index f8883fea17..2bf282a943 100644
--- a/manual/examples/testpass.c
+++ b/manual/examples/testpass.c
@@ -1,5 +1,5 @@
 /* Verify a passphrase.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 #include <stdio.h>
diff --git a/manual/examples/timeval_subtract.c b/manual/examples/timeval_subtract.c
index 77265bb252..edca57739a 100644
--- a/manual/examples/timeval_subtract.c
+++ b/manual/examples/timeval_subtract.c
@@ -1,5 +1,5 @@
 /* struct timeval subtraction.
-   Copyright (C) 1991-2018 Free Software Foundation, Inc.
+   Copyright (C) 1991-2019 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
@@ -12,7 +12,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, if not, see <http://www.gnu.org/licenses/>.
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
 */
 
 /* Subtract the `struct timeval' values X and Y,
diff --git a/manual/examples/twalk.c b/manual/examples/twalk.c
new file mode 100644
index 0000000000..afa2b6e8a4
--- /dev/null
+++ b/manual/examples/twalk.c
@@ -0,0 +1,56 @@
+/* Implement twalk using twalk_r.
+   Copyright (C) 2019 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include <search.h>
+
+struct twalk_with_twalk_r_closure
+{
+  void (*action) (const void *, VISIT, int);
+  int depth;
+};
+
+static void
+twalk_with_twalk_r_action (const void *nodep, VISIT which, void *closure0)
+{
+  struct twalk_with_twalk_r_closure *closure = closure0;
+
+  switch (which)
+    {
+    case leaf:
+      closure->action (nodep, which, closure->depth);
+      break;
+    case preorder:
+      closure->action (nodep, which, closure->depth);
+      ++closure->depth;
+      break;
+    case postorder:
+      /* The preorder action incremented the depth.  */
+      closure->action (nodep, which, closure->depth - 1);
+      break;
+    case endorder:
+      --closure->depth;
+      closure->action (nodep, which, closure->depth);
+      break;
+    }
+}
+
+void
+twalk (const void *root, void (*action) (const void *, VISIT, int))
+{
+  struct twalk_with_twalk_r_closure closure = { action, 0 };
+  twalk_r (root, twalk_with_twalk_r_action, &closure);
+}