v2writable: append, instead of prepending generated Message-ID

The original Message-ID is still the most important when
discussing with other recipients who do not rely on a message
flowing through public-inbox.  So whatever Message-ID we use
to deduplicate internally will be secondary and less important.

All of our front-end v2 code is order-independent, so we won't
let the message count against us, that way.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/PublicInbox/V2Writable.pm b/lib/PublicInbox/V2Writable.pm
index 01ec98ac..9b280c68 100644
--- a/lib/PublicInbox/V2Writable.pm
+++ b/lib/PublicInbox/V2Writable.pm
@@ -173,7 +173,7 @@ sub num_for_harder {
                         $num = $self->{skel}->{mm}->mid_insert($$mid0);
                 }
         }
-        PublicInbox::Import::prepend_mid($hdr, $$mid0);
+        PublicInbox::Import::append_mid($hdr, $$mid0);
         $num;
 }