* opts.c (common_handle_option): Add support for
	-fno-sanitize=all and -f{,no-}sanitize-recover=all.
	* doc/invoke.texi: Document -fno-sanitize=all,
	-f{,no-}sanitize-recover=all.  Document that
	-fsanitize=float-cast-overflow is not enabled
	by -fsanitize=undefined.  Fix up documentation
	of -f{,no-}sanitize-recover.

	* c-c++-common/asan/sanitize-all-1.c: New test.
	* c-c++-common/ubsan/sanitize-all-1.c: New test.
	* c-c++-common/ubsan/sanitize-all-2.c: New test.
	* c-c++-common/ubsan/sanitize-all-3.c: New test.
	* c-c++-common/ubsan/sanitize-all-4.c: New test.

From-SVN: r219241