updated for version 7.4.223

Problem:    Still using an older autoconf version.
Solution:   Switch to autoconf 2.69.

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    223,
 /**/
     222,
 /**/