patch 7.4.1426

Problem:    The "out-io" option for jobs is not implemented yet.
Solution:   Implement the "buffer" value: append job output to a buffer.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1426,
 /**/
     1425,
 /**/