* libc/include/sys/reent.h (_ATEXIT_INIT_PTR): Remove.
	(_REENT_INIT_ATEXIT_PTR): Remove.
	(_REENT_INIT_PTR): Reduce code size if _REENT_SMALL.
	* libc/reent/reent.c (_reclaim_reent): Free also _misc and
	_signal_buf.
* libc/include/string.h (rawmemchr): Declare.
* libc/string/Makefile.am (ELIX_4_SOURCES): Add rawmemchr.c.
(CHEWOUT_FILES): Add rawmemchr.def.
* libc/string/Makefile.in: Regenerate.
* libc/string/rawmemchr.c: New file.