lei: get rid of client {pid} field

Using kill(2) is too dangerous since extremely long
queries may mean the original PID of the aborted lei(1)
client process to be recycled by a new process.  It would
be bad if the lei_xsearch worker process issued a kill
on the wrong process.

So just rely on sending the exit message via socket.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/LeiQuery.pm b/lib/PublicInbox/LeiQuery.pm
index 040c284d..d5376be5 100644
--- a/lib/PublicInbox/LeiQuery.pm
+++ b/lib/PublicInbox/LeiQuery.pm
@@ -76,7 +76,7 @@ sub lei_q {
         }
         my $j = $opt->{jobs} // scalar(@srcs) > 4 ? 4 : scalar(@srcs);
         $j = 1 if !$opt->{thread};
-        if ($self->{pid}) {
+        if ($self->{sock}) {
                 $lxs->wq_workers_start('lei_xsearch', $j, $self->oldset)
                         // $self->wq_workers($j);
         }