Add git.o.o to list of ssl certificates we monitor

Change-Id: Ic8b33d88d4d379303620a8dedfa143008251f002
Add backup restore docs.

* doc/source/sysadmin.rst: Document how to restore from bup backups.

* modules/bup/files/etc/bup-excludes: Exclude special backup restore
dirs in /root. This prevents backup restores from being backed up
too.

Change-Id: Ide0e69c128be0a8b8774df7acaf9267df097f104
update thirdy party testing how to doc

I don't believe openstack has it's own jenkins gerrit trigger plugin
anymore.  The link was returning a 404 Error.  Updated the link
to point to the general gerrit trigger plugin in the jenkins-ci repo.

Change-Id: Id42f2d8371b8c8e4a0f1f57e110637d4a8b14953
Merge "Add git.o.o to list of ssl certificates we monitor"
Merge "update thirdy party testing how to doc"
Merge "Add backup restore docs."