http: update comment about psgix.io usage

We've been using async_pass for a while.

diff --git a/lib/PublicInbox/HTTP.pm b/lib/PublicInbox/HTTP.pm
index e350daaff1c003bb3cd9ab43cb154b0d09e86d64..d2f04ba541e3865c2a9f6d0aa2a9b0781cadfc58 100644 (file)
--- a/lib/PublicInbox/HTTP.pm
+++ b/lib/PublicInbox/HTTP.pm
@@ -164,7 +164,7 @@ sub app_dispatch {
        }
        # note: NOT $self->{sock}, we want our close (+ PublicInbox::DS::close),
        # to do proper cleanup:
-       $env->{'psgix.io'} = $self; # only for ->close
+       $env->{'psgix.io'} = $self; # for ->close or async_pass
        my $res = Plack::Util::run_app($self->{httpd}->{app}, $env);
        eval {
                if (ref($res) eq 'CODE') {