vim-patch:partial:9.0.1166: code is indented more than necessary (#21716)

Problem:    Code is indented more than necessary.
Solution:   Use an early return where it makes sense. (Yegappan Lakshmanan,
            closes vim/vim#11792)

1cfb14aa97

Partial port as some highlight.c changes depend on previous patches.
Cherry-pick fname_match() change from patch 8.2.4959.
Omit internal_func_check_arg_types(): only used for Vim9 script.

N/A patches for version.c:

vim-patch:9.0.1167: EditorConfig files do not have their own filetype

Problem:    EditorConfig files do not have their own filetype.
Solution:   Add the "editorconfig" filetype. (Gregory Anders, closes vim/vim#11779)

d41262ed06

Co-authored-by: Yegappan Lakshmanan <yegappan@yahoo.com>

src/nvim/fold.c

@@ -481,7 +481,7 @@ void foldCheckClose(void)
     return;
   }
 
-  // can only be "all" right now
+  // 'foldclose' can only be "all" right now
   checkupdate(curwin);
   if (checkCloseRec(&curwin->w_folds, curwin->w_cursor.lnum,
                     (int)curwin->w_p_fdl)) {