mod_archive: Fix duplicate messages stored Message exchanged between users on the same server would be stored twice. This is because both the message hook and the pre-message hook would store for both users. The solution is to make sure the pre-message hook only store for the 'from' user, and the post message hook only store for the 'to' user.

<div class="muc_statusChange_container">###TIME_STUFF###<span class="muc_statusChange"> *** ###NICK### shows as "###SHOW###"###STATUS_STUFF###</span><br /></div>