LJ::Talk::unfreeze_thread — unfreezes an entire thread of comments.
LJ::Talk::unfreeze_thread(u, jitemid, jtalkid);
u. Userid or user object to unfreeze thread from.
jitemid. Journal itemid of item to unfreeze comments from.
jtalkid. Journal talkid of comment at top of thread to unfreeze.
1 on success; undef on error