patch 8.2.5011: Replacing an autocommand requires several lines

Problem:    Replacing an autocommand requires several lines.
Solution:   Add the "replace" flag to autocmd_add(). (Yegappan Lakshmanan,
            closes #10473)

src/version.c

@@ -734,6 +734,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    5011,
 /**/
     5010,
 /**/