added option for showing the mod in ban page.

also fixes issue where the Staff is not shown in ban appeals.
?/bans: fix pagination - can now see all bans on all boards if > $config[mod][banlist_page]

Conflicts:
	inc/bans.php
Added support for BSD md5 incase md5sum isn't available.
FFmpeg support for WebMs. Fixes threads with large amounts of WebM's causing crashes for some users.
Added escapeshellarg() for WebM thumbnail generation.
Fixed spoiler thumbnails not showing up in the recent theme