[BALUG-Admin] "automatically" subscribe to BALUG-Announce if ... - various descriptive updates, etc.

[Michael Paoli]

So, I updated, clarified, and relatively unified/standardized the
language.

Basic idea is if one is subscribed to BALUG-Talk and/or BALUG-Admin,
but not BALUG-Announce, one gets subscribed to BALUG-announce ...
but there's also an exception process if one really doesn't want that.

Various pros/cons compared to, e.g. "umbrella list" - went over that
many moons ago, and opted to *not* do "umbrella list" - and I still
think that's generally better (more flexible, etc., but adds wee bit
'o code/work to (semi-)automate the handling without doing "umbrella list".

Anyway, many moons ago, I semi-automated it.  The only part that is
likely to remain manual, is if anyone requests to be added to (or removed
from) exception - fairly simple, their email address(es) get added to (or
removed from) a file.  The other bits thus far have been
semi-manual/semi-automated (I probably should've further automated it long
ago ... but not it's getting much closer to being fully automated - except
for folks requesting change of their exception status).

Basic idea also, with the automation, will probably code it up to check
daily, but also include a bit 'o hysteresis - so we don't catch user
just as they're manually subscribing, and "race" and beat 'em to adding
'em to BALUG-Announce (that would be kind'a impolite and confusing).
So, I was thinkin', code would check, upon finding candidates to add, note
that ... and once so noted information is >~=48 hours old, upon subsequent
checks, with situation otherwise being still the same, *then*, they'd get
automagically added.

Oh, also updated those relevant URLs from lists.balug.org to temp.balug.org.
So, locations of updated text and web pages, etc.
There are the list info pages, directly under (one link level beyond):
https://temp.balug.org/cgi-bin/mailman/listinfo

There's old link location, and newer, all same content:
http://www.balug.org/lists/balug-announce-do-not-auto-add.html
https://temp.balug.org/lists/balug-announce-do-not-auto-add.html
and will be in future:
https://lists.balug.org/lists/balug-announce-do-not-auto-add.html
I'm thinking eventually canonicalize upon the one above ... but we're
not there yet (and then also then have:
https://www.balug.org/lists/balug-announce-do-not-auto-add.html
redirect to that same canonical - also future
).