patch 8.2.0577: not all modifiers supported for :options

Problem:    Not all modifiers supported for :options.
Solution:   Use all cmdmod.split flags. (closes #4401)
diff --git a/src/version.c b/src/version.c
index d5b6a05..15a9393 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    577,
+/**/
     576,
 /**/
     575,