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2016-06-02Fix some license headers.Richard Braun
As the original author of the files imported, I explicitely dual license them to something compatible with GPLv2. kern/macros.h: Switch license from GPLv3 to BSD 2-clause. kern/rdxtree_i.h: Likewise.
2015-05-20kern: add radix tree libraryJustus Winter
Import a radix tree library from Richard Braun's librbraun. * Makefile.am (clib_routines): Steal `__ffsdi2'. * Makefrag.am (libkernel_a_SOURCES): Add new files. * kern/rdxtree.c: New file. * kern/rdxtree.h: Likewise. * kern/rdxtree_i.h: Likewise. * kern/startup.c (setup_main): Initialize radix tree library.