patch 8.1.0657: get error for using regexp recursively

Problem:    Get error for using regexp recursively. (Dominique Pelle)
Solution:   Do no check if connection is desired.

src/version.c

@@ -799,6 +799,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    657,
 /**/
     656,
 /**/