patch 8.2.4863: accessing freed memory in test without the +channel feature

Problem:    Accessing freed memory in test without the +channel feature.
            (Dominique Pellé)
Solution:   Do not generted PUSHCHANNEL or PUSHJOB if they are not
            implemented. (closes #10350)

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4863,
 /**/
     4862,
 /**/