[Mailman-Users] HTTP_X_FORWARDED_FOR logging support

[Stephen J. Turnbull]

P.S. I'm not at all opposed to the patch as you propose it, I'm just
thinking about loud about extensions.  It's all blue sky though, and
you have a concrete reason for this.  As the Timbot said:

    Now is better than never.
    Although never is often better than *right* now.

The first is for you, the second is for me. :-)