Updated mediawiki/extensions
Project: mediawiki/extensions/TimedMediaHandler  7478b2eba39459c3210d80d3bc63182940bb6226

deduplicate transcode jobs

deduplicate transcode jobs on title/key and
add maintenance script to resubmit
unprocessed transcode jobs

Change-Id: Ibb4f7fff37cefaa784a9d5577fa31db034363d81