Fix weird "Default object created from empty vlaue" error

Looks like $file can be NULL sometimes, though that should be illegal. Probably an unfixed post.php bug...
Don't expand webm or YouTube videos on js/expand-all-images.js
SECURITY / XSS : ?/edit allowed arbitrary HTML to be added by any user thru addition of <tinyboard raw html>1</tinyboard>

This allowed ANY user with ?/edit privilege to also have raw_html regardless of whether they had $config['mod']['rawhtml']

Now, any changes to <tinyboard> markup modifiers via ?/edit are not allowed. They are removed at read time, and before write they are removed again and the ones in the database (which should be clean...) are inserted instead.

Please immediately apply this patch to your instance if you are running any version of 8chan/infinity.
Remove links from ban list
Preview board flags script
README update: we inifinity now
Merge

Conflicts:
	inc/mod/pages.php