Partial phase out of *winehq.com addresses

[Duane Clark]

As mentioned about a month ago, we were planning to phase out the 
winehq.com email addresses, and use winehq.org exclusively. It looks 
like the few holdouts have converted over for awhile now, so I added a 
filter to the mailman program to silently drop anything mailed to 
winehq.com.

If Jeremy wants to set the MTA (or whatever) to reject those addresses, 
that might be better. Then anyone accidently mailing to the wrong 
address would (presumably) get a delivery error message. And it would 
take a small portion of the load off mailman.