This incorporates:
2018-01-01 maint: Run 'make update-copyright'
2017-12-29 Add cross-compilation results for GNU/Hurd.
2017-12-12 explicit_bzero: port to macOS + Clang 9.0.0
2017-01-30 Port to PGI 16.10 x86-64
2017-01-20 time_rz: fix comment typo
2017-01-14 strftime: %z is -00 if unknown
This incorporates:
* doc/misc/texinfo.tex, lib/c-ctype.h, lib/strftime.c:
* lib/time-internal.h, lib/verify.h:
Copy from gnulib.
This incorporates:
2016-05-30 Use GCC_LINT, not lint
2016-05-29 secure_getenv: Port to many more platforms.
* doc/misc/texinfo.tex, lib/secure_getenv.c, lib/verify.h:
* m4/secure_getenv.m4: Copy from gnulib.
* src/conf_post.h (__has_builtin, assume): Remove; gnulib now does these.
* src/lisp.h: Include <verify.h>, for 'assume'.
This also incorpoprates:
2013-10-02 verify: new macro 'assume'
2013-09-26 dup2, dup3: work around another cygwin crasher
2013-09-26 getdtablesize: work around cygwin issue