patch 8.2.0988: getting directory contents is always case sorted

Problem:    Getting directory contents is always case sorted.
Solution:   Add sort options and v:collate. (Christian Brabandt, closes #6229)
diff --git a/src/globals.h b/src/globals.h
index cb85bcc..bbc12ce 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1699,6 +1699,8 @@
 EXTERN char e_unknown_option[]	INIT(= N_("E113: Unknown option: %s"));
 EXTERN char e_letunexp[]	INIT(= N_("E18: Unexpected characters in :let"));
 EXTERN char e_reduceempty[]	INIT(= N_("E998: Reduce of an empty %s with no initial value"));
+// TODO: Change Error Number
+EXTERN char e_no_dict_key[]	INIT(= N_("E999: Dictionary with key \"%s\" required"));
 #endif
 #ifdef FEAT_QUICKFIX
 EXTERN char e_readerrf[]	INIT(= N_("E47: Error while reading errorfile"));