[Balug-Admin] List policy tweaks, and "announce" auto-subscribe

[Michael Paoli]

BALUG list policies have been tweaked slightly.

Most notably, if one isn't subscribed to "announce" but is subscribed to
other BALUG list(s), one may be added to "announce" - there's also an
exception procedure for those that don't want to be (semi-)automatically
added to "annouce" based upon not being subscibed to "announce" but
being subscribed to other BALUG lists.

references:
http://www.balug.org/#Lists
http://lists.balug.org/listinfo.cgi/balug-announce-balug.org
http://lists.balug.org/listinfo.cgi/balug-talk-balug.org
http://lists.balug.org/listinfo.cgi/balug-admin-balug.org