Improve description of `named-refused.local` file.

Developing-Regex-in-Fail2ban.md

@@ -289,7 +289,11 @@ APPENDIX
 #     print-time yes;
 #     print-severity true;
 #     print-category true;
-# in the "query-errors" category of "logging" statement.
+# in the "<your-custom-channel-name>" channel that references 
+# the "query-errors" category in "category" statement 
+# inside "logging" clause.
+# 
+# The required logging clause portion, of the named.conf, is sematically:
 #
 #     logging {
 #         category query-errors { query-errors_file; };