[PATCH 2/2] watchmaildir: match List-ID case-insensitively

[Eric Wong <e@yhbt.net>]

RFC 2919 section 6 states the following:

  There is only one operation defined for list identifiers,
  that of case insensitive equality.

So no arguing with that.  Now, the other headers are
open to interpretation, so put a note about them.
---
 lib/PublicInbox/WatchMaildir.pm | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/WatchMaildir.pm b/lib/PublicInbox/WatchMaildir.pm
index 02e4b32f..71bd84fc 100644
--- a/lib/PublicInbox/WatchMaildir.pm
+++ b/lib/PublicInbox/WatchMaildir.pm
@@ -62,12 +62,17 @@ sub new {
 			if (my $whs = $ibx->{watchheader}) {
 				for (@$whs) {
 					my ($k, $v) = split(/:/, $_, 2);
+					# XXX should this be case-insensitive?
+					# Or, mutt-style, case-sensitive iff
+					# a capital letter exists?
 					push @$watch_hdrs, [ $k, qr/\Q$v\E/ ];
 				}
 			}
 			if (my $list_ids = $ibx->{listid}) {
 				for (@$list_ids) {
-					my $re = qr/<[ \t]*\Q$_\E[ \t]*>/;
+					# RFC2919 section 6 stipulates
+					# "case insensitive equality"
+					my $re = qr/<[ \t]*\Q$_\E[ \t]*>/i;
 					push @$watch_hdrs, ['List-Id', $re ];
 				}
 			}