* faq-setup.xml (faq.setup.upgrade-mountpoints): Remove.
	* pathnames.xml (pathnames-mount-ex): Remove note about 1.5->1.7
	registry mount point updates.
Fix date of latest entry
	* environ.cc (regopt): Remove function.
	(environ_init): Drop undocumented feature to read application-specific
	environment variables from the registry.
	* include/cygwin/version.h (CYGWIN_INFO_PROGRAM_OPTIONS_NAME): Remove.
	* libc/time/gmtime_r.c (gmtime_r): Fixed bug in calculations for dates
	after year 2069 or before year 1901. Ideas for solution taken from
	musl's __secs_to_tm()
	* libc/machine/aarch64/strrchr.S: New file.
	* libc/machine/aarch64/strrchr-stub.c: New file.
	* libc/machine/aarch64/Makefile.am: Add them to build list.
	* libc/machine/aarch64/Makefile.in: Regenerated.