move regString definition
fix embedding in inline quotes
Lets not even bother linkifying a comment with no links.

ccd0: not committing this part for now:
Also switch out some loops.
Eliminate title cacheing for the time being.
Causing too many problems.
Also attempt to optimize Linkify.
remove leftover cached title stuff
Small Linkifier miss involving hostname.com:port
Clean reserved words
Fuck protocols.
remove semicolon
twitch.tv URLs appear to be banned from 4chan, no point in maintaining this code
switch to template approach
update mediacru.sh filetypes
soundcloud doesn't need to inject their own HTML
fix stray quote mark
one less innerHTML to check
hide links on embed instead of recreating them on unembed
easier to see safety of innerHTML use from one line