Merge from gnulib

Merge from gnulib

This incorporates:
2017-01-09 maint: time stamp -> timestamp
2017-01-07 stdioext: Port to Minix 3.2 and newer
2017-01-06 glob, intprops, xalloc: work around Clang bug
2017-01-02 revert copyright-year change to synced files
* doc/misc/texinfo.tex, lib/fpending.c, lib/intprops.h, lib/mktime.c:
* lib/stat-time.h, lib/stdio-impl.h, lib/time.in.h, lib/timespec.h:
* lib/utimens.c, lib/xalloc-oversized.h:
Copy from gnulib.