Find relative url in mixed text/html

[Laura Creighton]

In a message of Sun, 29 Nov 2015 00:25:07 +0800, Rob Hills writes:
>All that said, I'd be interested to see specific (and hopefully
>unbiased) info about phpBB's failings...

People I know of who run different bb software say that the spammers
really prefer phpBB.  So keeping it spam free is about 4 times the
work as for, for instance, IPB.

Hackers seem to like it too -- possibly due to this:
http://defensivedepth.com/2009/03/03/anatomy-of-a-hack-the-phpbbcom-attack/

make sure you aren't vulnerable.