lei up: automatically use dt: for remote externals

Since we can't use maxuid for remote externals, automatically
maintaining the last time we got results and appending a dt:
range to the query will prevent HTTP(S) responses from getting
too big.

We could be using "rt:", but no stable release of public-inbox
supports it, yet, so we'll use dt:, instead.

By default, there's a two day fudge factor to account for MTA
downtime and delays; which is hopefully enough.  The fudge
factor may be changed per-invocation with the
--remote-fudge-factor=INTERVAL option

Since different externals can have different message transport
routes, "lastresult" entries are stored on a per-external basis.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/LeiUp.pm b/lib/PublicInbox/LeiUp.pm
index 4637cb46..abb05d46 100644
--- a/lib/PublicInbox/LeiUp.pm
+++ b/lib/PublicInbox/LeiUp.pm
@@ -45,7 +45,7 @@ sub up1 ($$) {
                 ref($v) and return $lei->fail("multiple values of $c in $f");
                 $lei->{opt}->{$k} = $v;
         }
-        $lei->{lss} = $lss; # for LeiOverview->new
+        $lei->{lss} = $lss; # for LeiOverview->new and query_remote_mboxrd
         my $lxs = $lei->lxs_prepare or return;
         $lei->ale->refresh_externals($lxs, $lei);
         $lei->_start_query;