[website-dev] One more step in the Spam battle on the OOoWiki

I've been watching the current spam on the OOoWiki, and checking to see 
what the spammers are using for registration data - one consistent point 
is that a lot of the spam accounts are created using throw-away or 
one-time-use email services as their registration email.

With some (a lot actually) help from the MediaWiki mailing list guys, 
I've added some code to watch for two of the common throwaway email 
services.  This can be expanded if necessary by adding to the reg.ex. in 
the function.

This is now documented here:
http://wiki.services.openoffice.org/wiki/Help:Block_email

If anyone sees any issues with this implementation, let me know.


C.