patch 8.2.3829: no error when setting a func option to script-local function

Problem:    No error when setting a func option to a script-local function.
Solution:   Give an error if the name starts with "s:". (closes #9358)

src/version.c

@@ -749,6 +749,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3829,
 /**/
     3828,
 /**/