rules.pl: change DRAFT to DO NOT REVIEW, and make triggers case-insensitive

rules.pl

diff --git a/rules.pl b/rules.pl
index 15ed563..6b5fbac 100644
--- a/rules.pl
+++ b/rules.pl
@@ -1,19 +1,21 @@
-% We don't send email if the commit message says DRAFT, so don't allow submit either.
+% We don't send email if the commit message says DO NOT REVIEW, so don't allow submit either.
+% Case insensitive because the mail filter rules are.
 submit_filter(In, Out) :-
 	In =.. [submit | I],
-	gerrit:commit_message_matches('DRAFT'),
+	gerrit:commit_message_matches('[Dd][Oo][ \t\r\n]+[Nn][Oo][Tt][ \t\r\n]+[Rr][Ee][Vv][Ii][Ee][Ww]'),
 	!,
 	gerrit:commit_author(Id),
-	Error = label('Cannot-Submit-DRAFT-Commit', reject(Id)),
+	Error = label('Do-Not-Review', reject(Id)),
 	Out =.. [submit, Error | I].
 
 % Don't allow submit of DO NOT SUBMIT commit message either.
+% Using same label as above to avoid yet another column in the CL dashboard on Gerrit.
 submit_filter(In, Out) :-
 	In =.. [submit | I],
-	gerrit:commit_message_matches('DO NOT SUBMIT'),
+	gerrit:commit_message_matches('[Dd][Oo][ \t\r\n]+[Nn][Oo][Tt][ \t\r\n]+[Ss][Uu][Bb][Mm][Ii][Tt]'),
 	!,
 	gerrit:commit_author(Id),
-	Error = label('Cannot-Submit-DO-NOT-SUBMIT-Commit', reject(Id)),
+	Error = label('Do-Not-Review', reject(Id)),
 	Out =.. [submit, Error | I].
 
 % Otherwise, pass submit rule through.