Osmocom.org Servers

As per http://lists.openmoko.org/pipermail/community/2017-October/069832.html

   * lisst: migrate the single remaining active
     (community at lists.openmoko.org) to another mailman instance, such as
     lists.osmocom.org.  We could configure mailman to retain the
     list-id and simply point the MX to the osmocom.org server, i.e. do
     this without any impact on the list address or users mail filtering
     rules.
   * e-mail: discontinue e-mail services at openmoko.org (except e-mail
     forwarding).  To my knowledge, only Joerg Reisenweber is using this
     service today - and to be fair, I would kindly suggest to use a
     different imap-capable home for his e-mail after about a decade
     of using the Openmoko legacy. Sorry :)

I think rather than completely discontinuing it, we can migrate it to osmocom.org where we already run mailman and a MTA. Only part missing is cyrus-imapd, which would make a nice addition on osmocom.org, anyway.