updated for version 7.3.143

Problem:    Memfile is not tested sufficiently.  Looking up blocks in a
            memfile is slow when there are many blocks.
Solution:   Add high level test and unittest.  Adjust the number of hash
            buckets to the number of blocks.  (Ivan Krasilnikov)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    143,
 /**/
     142,
 /**/