fixes: QubesOS/qubes-issues#1611

Test vm1 -> relay -> vm2-remote call path. Do it on a single host by
having relay service that transform names (source to source-remote and
target-remote to target). For this to work, there need to be matching
pairs of VMs with and without -remote suffix, and appropriate policy for
both outgoing and incoming connections.

For now put the test into 'misc' package, when there will be more
qubes-air related tests, move it elsewhere.

QubesOS/qubes-issues#9015

RemoteVM has much less attributes, so use getattr to handle this
gracefully. At the same time, add also "relayvm" attribute too.

QubesOS/qubes-issues#9015

Larger systems have multiple root buses, adjust handling appropriately.

* remote-vm-test:
  tests: fix cleanup code to handle RemoteVM too
  tests: add simple end-to-end test of remote qrexec calls

* origin/pr/673:
  Assure paused domains prior to suspending remain paused

Core and API part of adding free-form text to each qube for comments,
notes, descriptions, remarks, reminders, etc.

fixes: QubesOS/qubes-issues#899

* origin/pr/656:
  Add free-form text to qube for notes, comments, ...