File php-CVE-2017-16642.patch of Package php7.15211

--- a/ext/date/lib/parse_date.re
+++ b/ext/date/lib/parse_date.re
@@ -931,8 +931,8 @@ isoweek          = year4 "-"? "W" weekofyear;
 exif             = year4 ":" monthlz ":" daylz " " hour24lz ":" minutelz ":" secondlz;
 firstdayof       = 'first day of';
 lastdayof        = 'last day of';
-backof           = 'back of ' hour24 space? meridian?;
-frontof          = 'front of ' hour24 space? meridian?;
+backof           = 'back of ' hour24 (space? meridian)?;
+frontof          = 'front of ' hour24 (space? meridian)?;
 
 /* Common Log Format: 10/Oct/2000:13:55:36 -0700 */
 clf              = day "/" monthabbr "/" year4 ":" hour24lz ":" minutelz ":" secondlz space tzcorrection;