Added dynamic translator tracking facilities

nsmux cannot presently shut down gracefully (without the -f option)
after having done a magic lookup, because the dynamic translators it
starts hold ports (references) to its nodes and make the standard
fsys_goaway handler return with EBUSY. To solve the problem, nsmux
will need to keep track of dynamic translators and shut them down
explicitly, not relying on standard mechanisms, which don't know that
the translators might be stacked and might try stopping a translator
in the middle of the dynamic stack, which will certainly result in
EBUSY.

# Please enter the commit message for your changes.
# (Comment lines starting with '#' will not be included)
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   debug.h
#	modified:   lib.c
#	modified:   lib.h
#	modified:   lnode.c
#	modified:   lnode.h
#	modified:   magic.c
#	modified:   magic.h
#	modified:   ncache.c
#	modified:   ncache.h
#	modified:   node.c
#	modified:   node.h
#	modified:   nsmux.c
#	modified:   nsmux.h
#	modified:   options.c
#	modified:   options.h
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	my_S_dir_lookup.c
#	sav/
#	update

2 files changed, 1 insertions, 13 deletions

diff --git a/build b/build
index 2234dad6f..bfe91357a 100755
--- a/build
+++ b/build
@@ -1 +1 @@
-gcc -DDEBUG -Wall -g -lnetfs -lfshelp -liohelp -lthreads -lports -lihash -lshouldbeinlibc -o nsmux nsmux.c node.c lnode.c ncache.c options.c lib.c 2>&1 | tee errors
+gcc -DDEBUG -Wall -g -lnetfs -lfshelp -liohelp -lthreads -lports -lihash -lshouldbeinlibc -o nsmux nsmux.c node.c lnode.c ncache.c options.c lib.c magic.c trans.c 2>&1 | tee errors
diff --git a/node.h b/node.h
index de0013086..72adcbebb 100644
--- a/node.h
+++ b/node.h
@@ -59,18 +59,6 @@
 
 /*---------------------------------------------------------------------------*/
 /*--------Types--------------------------------------------------------------*/
-/*A list element containing a port*/
-struct port_el
-{
-  /*the port */
-  mach_port_t p;
-
-  /*the next element in the list */
-  struct port_el *next;
-};				/*struct port_el */
-/*---------------------------------------------------------------------------*/
-typedef struct port_el port_el_t;
-/*---------------------------------------------------------------------------*/
 /*The user-defined node for libnetfs*/
 struct netnode
 {