[BuildStream] Migration of development mailing list

[Tristan Van Berkom <tristan vanberkom codethink co uk>]

Hi all,

As another step in our project's migration to ASF[0], we are now
migrating our development mailing list to the new hosting.

The new list
~~~~~~~~~~~~
Please subscribe to the new mailing list by sending an email to:

    dev-subscribe buildstream apache org

I did this today and simply put the word "subscribe" in the subject
line, and then you get the usual user friendly response which instructs
you to reply for verification purposes and finally sends you a welcome
message.

Once subscribed, you can post messages to the new list with the
following address:

    dev buildstream apache org

And view archived discussions here:

    https://lists.apache.org/list.html?dev buildstream apache org


The current list
~~~~~~~~~~~~~~~~
In one week's time, the current list will be set to archive mode, and a
custom bounce message will be added:

   "These are not the droids you are sending email to."

The bounce message which will include instructions to subscribe to the
new mailing list, so anyone who has missed out on this message will be
well informed if they ever post to the old list.

Over the next week, we will be replacing references to this mailing
list with references to the new one (on wiki pages, websites, docs,
etc).

Thanks to Justin for creating the new list for us :)

Cheers,
    -Tristan


[0]: https://mail.gnome.org/archives/buildstream-list/2020-April/msg00010.html