Pull in change from HEAD, and:

	* faq-what.xml (faq.what.supported): Change to accommodate existence
	of 64 bit version.
	* Makefile.in ($(LIB_NAME)): Make sure to rebuild when cygwin.def file
	has been changed.
	* cygwin64.din: Remove more underscored symbols.
	(getdelim): Add missing define in favor of unneeded __getline.
	(getline): Ditto.
Forced checkin
Forced checkin
	* cygwin64.din: Reinstantiate definition of __srget and __srget_r.
	* cygcheck.cc (dll_info): Fix crash due to sizeof(time_t) being not
	equal to sizeof(int).  Output timestamp RFC 3339 compatible.
Merge branch 'cygwin64' into msys2-64-dev