This incorporates:
2017-06-11 getopt-posix: port to glibc 2.25.90
2017-06-04 same-inode: port better to VMS 8.2 and later
* doc/misc/texinfo.tex, lib/getopt-pfx-core.h, lib/getopt-pfx-ext.h:
* m4/sys_types_h.m4: Copy from gnulib.
This incorporates:
2017-04-29 getopt: port to Solaris 10 with circa-1997 glibc getopt.h
* lib/getopt-pfx-ext.h: Copy from gnulib.
* lib/gnulib.mk.in: Regenerate.
This incorporates:
2017-04-08 getopt: prefer - to _ in new file names
2017-04-08 getopt: port recent getopt changes to macOS
* .gitignore: Add lib/getopt-cdefs.h.
* lib/getopt-cdefs.in.h: Rename from lib/getopt_cdefs.in.h.
* lib/getopt-core.h: Rename from lib/getopt_core.h.
* lib/getopt-ext.h: Rename from lib/getopt_ext.h.
* lib/getopt-pfx-core.h: Rename from lib/getopt_pfx_core.h.
* lib/getopt-pfx-ext.h: Rename from lib/getopt_pfx_ext.h.
* lib/getopt.in.h, lib/unistd.in.h, m4/getopt.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
