imap: omit $UID_END from mailbox name, use index

Having two large numbers separated by a dash can make visual
comparisons difficult when numbers are in the 3,000,000 range
for LKML.  So avoid the $UID_END value, since it can be
calculated from $UID_MIN.  And we can avoid large values of
$UID_MIN, too, by instead storing the block index and just
multiplying it by 50000 (and adding 1) on the server side.

Of course, LKML still goes up to 72, at the moment.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/IMAPD.pm b/lib/PublicInbox/IMAPD.pm
index 6488dc0f..261d7560 100644
--- a/lib/PublicInbox/IMAPD.pm
+++ b/lib/PublicInbox/IMAPD.pm
@@ -31,7 +31,7 @@ sub imapd_refresh_ibx { # pi_config->each_inbox cb
                         join(', ', @$ngname). "\n";
                 return;
         } elsif ($ngname =~ m![^a-z0-9/_\.\-\~\@\+\=:]! ||
-                 $ngname =~ /\.[0-9]+-[0-9]+\z/) {
+                 $ngname =~ /\.[0-9]+\z/) {
                 warn "mailbox name invalid: newsgroup=`$ngname'\n";
                 return;
         }