lei: use -signal numbers for old Perl

Unlike modern Perls, Perl 5.16.3 on CentOS doesn't accept
negative string signals like "-TERM" .

This only became a problem since commit b231d91f42d7
(treewide: enable warnings in all exec-ed processes)
made our code stricter by enabling more warnings.
In both cases, the kill is probably unnecessary and safe
to remove since we can rely on closing sockets to drop
processes.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/LEI.pm b/lib/PublicInbox/LEI.pm
index 77acb5a1..69065ce7 100644
--- a/lib/PublicInbox/LEI.pm
+++ b/lib/PublicInbox/LEI.pm
@@ -474,7 +474,7 @@ my @WQ_KEYS = qw(lxs l2m ikw pmd wq1 lne v2w); # internal workers
 sub _drop_wq {
         my ($self) = @_;
         for my $wq (grep(defined, delete(@$self{@WQ_KEYS}))) {
-                $wq->wq_kill('-TERM');
+                $wq->wq_kill(-POSIX::SIGTERM());
                 $wq->DESTROY;
         }
 }