Not always online capsules

[Stephane Bortzmeyer]

On Wed, Sep 22, 2021 at 06:45:57PM +0100,
 Alice <lia@loveisanalogue.info> wrote 
 a message of 28 lines which said:

> Would we want one general message for the domain (so not Gemini specific) or would we want a specific message per protocol ?
> 
> I'd go for simplicity (so message per domain, as you've done) but I guess some people might prefer the other way.

Well, port 443 to some.thing.example may go to a different machine
than port 1965, thanks to the various "routers" we have now, so there
is no reason they will share the same fate.

I suggest to get inspiration from the DANE protocol and to prefix the
name with the port:

_443._tcp.some.thing.example IN TXT "The Web server works"

_1965._tcp.some.thing.example IN TXT "The Gemini server will be back at 21:00 UTC"