See merge request nexedi/slapos.core!434

Until now, the broadcast address was used for the tun interface instead
of the first address of the range.

See merge request !436

See merge request nexedi/slapos.core!435

  We do want to ignore payments that occur after the at_date.

  We want to know if at a certain date, there still unpayed documents older them that date, if the document is payed after, (and grouped) we unconsider it.

   This was missing to remove since we dropped all mass upgrade code and relies exclusively on Upgrade Decisions.

   Upgrade decisions are also tickets (messages are issued), this makes things consistent with the other tickets (Regularisation Requests and Support Requests)

   This allows administrator see issued messages.

See merge request nexedi/slapos.core!431

If computer partition requested state is `started`, slapos node boot will start
partition services on reboot, event if the node is not able to connect to master or
has no internet.

See merge request nexedi/slapos.core!428

See merge request nexedi/slapos.core!430