miscsearch: index UIDVALIDITY, use as startup cache

This brings -nntpd startup time down from ~35s to ~5s with 50K
inboxes.

Further improvements ought to be possible with deeper changes to
MiscIdx, since -mda having to load every inbox seems unreasonable;
but this general change is fairly unintrusive.

1 files changed, 2 insertions, 2 deletions

diff --git a/t/search.t b/t/search.t
index 11143204..3754717d 100644
--- a/t/search.t
+++ b/t/search.t
@@ -332,13 +332,13 @@ $ibx->with_umask(sub {
                 like($smsg->{to}, qr/\blist\@example\.com\b/, 'to appears');
                 my $doc = $m->get_document;
                 my $col = PublicInbox::Search::BYTES();
-                my $bytes = PublicInbox::SearchIdx::int_val($doc, $col);
+                my $bytes = PublicInbox::Search::int_val($doc, $col);
                 like($bytes, qr/\A[0-9]+\z/, '$bytes stored as digit');
                 ok($bytes > 0, '$bytes is > 0');
                 is($bytes, $smsg->{bytes}, 'bytes Xapian value matches Over');
 
                 $col = PublicInbox::Search::UID();
-                my $uid = PublicInbox::SearchIdx::int_val($doc, $col);
+                my $uid = PublicInbox::Search::int_val($doc, $col);
                 is($uid, $smsg->{num}, 'UID column matches {num}');
                 is($uid, $m->get_docid, 'UID column matches docid');
         }