+A Maildir to watch for confirmed spam messages to appear in.
+Messages which appear in this folder with the (S)een flag
+will be hidden from all configured inboxes based on Message-ID
+and content matching.
+
+Messages without the (S)een flag are not considered for hiding.
+This hiding affects all configured public-inboxes in PI_CONFIG.
+
+As with C<publicinbox.$NAME.watch>, C<imap://> and C<imaps://> URLs
+are supported in public-inbox 1.6.0+.
+
+Default: none; only for L<public-inbox-watch(1)> users
+
+=item imap.Starttls / imap.$URL.Starttls
+
+Whether or not to use C<STARTTLS> on plain C<imap://> connections.
+
+May be specified for certain URLs via L<git-config(1)/--get-urlmatch>
+in C<git(1)> 1.8.5+.
+
+Default: C<true>
+
+=item imap.Compress / imap.$URL.Compress