* backupfile.c, dirfd.h, fts.c, getcwd.c, glob.c, glob_.h: Ignore the obsolescent !HAVE_DIRENT_H case. Consolidate NAMLEN macros into the GNU _D_EXACT_NAMLEN. * savedir.c: Likewise. (savedirstream): Use _D_EXACT_NAMLEN in preference to strlen. * backupfile.m4, d-ino.m4, d-type.m4, dirfd.m4, fts.m4, getcwd.m4: * savedir.m4: Ignore the obsolescent !HAVE_DIRENT_H case. Consolidate NAMLEN macros into the GNU _D_EXACT_NAMLEN.