patch 7.4.2231

Problem:    ":oldfiles" output is a very long list.
Solution:   Add a pattern argument. (Coot, closes #575)

src/version.c

@@ -763,6 +763,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2231,
 /**/
     2230,
 /**/