LJ::get_newids — Lookup an old global ID and see what journal it belongs to and its new ID.
area. The "area" of the id. Legal values are "L" (log), to lookup an old itemid, or "T" (talk) to lookup an old talkid.
oldid. The old globally-unique id of the item.
Interface to oldids table (URL compatability)
Undef if non-existent or unconverted, or arrayref of [$userid, $newid].