+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.$URL.Compress
+
+Whether or not to use the IMAP COMPRESS (RFC4978) extension to
+save bandwidth. This is not supported by all IMAP servers and
+some advertising this feature may not implement it correctly.
+
+May be specified only for certain URLs if L<git(1)> 1.8.5+ is
+installed to use L<git-config(1)/--get-urlmatch>
+
+Default: C<false>
+
+=item nntp.Starttls / nntp.$URL.Starttls
+
+Whether or not to use C<STARTTLS> on plain C<nntp://> connections.
+
+May be specified for certain URLs via L<git-config(1)/--get-urlmatch>
+in C<git(1)> 1.8.5+.
+
+Default: C<false> if the hostname is a Tor C<.onion>, C<true> otherwise
+
+=back