patch 7.4.1855

Problem:    Valgrind reports memory leak for job that is not freed.
Solution:   Free all jobs on exit.  Add test for failing job.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1855,
 /**/
     1854,
 /**/