[svlug] Cloudbleed ahoy

[Rick Moen]

Quoting Dire Red (deirdre at deirdre.net):

> List of affected domains can be found here:
> https://github.com/pirate/sites-using-cloudflare
> 
> Deirdre

Sorry about having noticed you'd already posted the list here.  But I
can use this chance to add this caveat:  The list has 4,287,625 domains,
one per line.  A 22 megabyte zipped text file.  Holy moley.

Suffice to say, this will _not_ be a suitable occasion for visual
grepping, but rather (at least) some crude caveman-sysadmin scripting
(not yet tried).  Something using good old 'grep -x -F string file' may
be good enough, pending experimentation to check speed.  I'm sure there
are lots of ways to make that smarter and faster.

Some solutions to a problem in the same general problem space:
http://stackoverflow.com/questions/18204904/fast-way-of-finding-lines-in-one-file-that-are-not-in-another