* sysdeps/posix/getcwd.c [__GNU_LIBRARY__]: Include unistd.h.
* io/fts.h (FTSENT): Define fts_compar member with prototype.
* hurd/hurd.h: Use prototype in getcttyid decl.
* stdlib/l64a.c: Fix typo in last change.
* stdlib/drand48-iter.c: Test limits.h macros instead of sizeof
for determining size of types.
* stdlib/srand48_r.c: Likewise.
* misc/utmp.h: Declare login, logout, logwtmp.
* misc/logout.c: Declare argument as pointer to const.
* misc/login.c: Likewise.
* misc/logwtmp.c: Likewise.
Include time.h, string.h.
* misc/efgcvt_r.c: Include stdlib.h.
* io/mknod.c: Include sys/types.h.
* gmon/sys/gmon.h: Declare monstartup, _mcleanup.
* csu/gmon-start.c (_start, etext): Declare with prototypes.
* stdio-common/vfscanf.c (%[): Fix range handling.
