patch 7.4.1601

Problem:    README files take a lot of space in the top directory.
Solution:   Move most of them to "READMEdir".

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1601,
 /**/
     1600,
 /**/