patch 9.0.1267: the did_set_string_option function is too long

Problem:    The did_set_string_option function is too long.
Solution:   Further cleanup of handling string options.  (Yegappan Lakshmanan,
            Lewis Russell, closes #11920)
diff --git a/src/version.c b/src/version.c
index dcf223e..e06b6be 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1267,
+/**/
     1266,
 /**/
     1265,