CA-109476: Read rrd plugin timestamp as int64

It's written as an int64 by the plugin library. Also, a standard int
isn't big enough to hold a typical Unix epoch.

This value isn't actually used, rrdd just relies on it changing so
that the plugin payload's checksum changes even if the data source
values stay the same. However, it would be nice if it's correct in
case we do ever want to use it!

Signed-off-by: John Else <john.else@citrix.com>
Remove a modprobe warning in new systems.

New modprobe give a warning if configuration files do not end with .conf.
Add .conf to /etc/modprobe.d/blacklist-bridge in order to avoid this
warning.

Signed-off-by: Frediano Ziglio <frediano.ziglio@citrix.com>
CA-111270: Document VM_guest_metrics.memory as holding no data.
Nothing has been written to this field since before George
(XS5.5 release in 2008). It was disabled in favour of the RRD
data sources.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>
CA-111269: Document VM_guest_metrics.disks as holding no data.
Nothing has been written to this field since before XenServer 5.0.

Signed-off-by: Thomas Sanders <thomas.sanders@citrix.com>
CA-105903: vbd-unplug --force works regardless of surprise-remove state

This is just acknowledging the changes that were introduced in Tampa, and not a
change in behaviour since Tampa.

Signed-off-by: Mike McClurg <mike.mcclurg@citrix.com>
Merge pull request #1336 from johnelse/ca-109476

CA-109476: Read rrd plugin timestamp as int64
Merge pull request #1361 from thomassa/good-blank-vm-metrics

Docs-fix: VM_guest_metrics.disks and .memory were removed years ago.
Merge pull request #1359 from freddy77/modprobe_warning

/etc/modprobe.d/blacklist-bridge filename should end in .conf
Merge pull request #1389 from mcclurmc/surprise

 CA-105903: VBD surprise-remove flag is now ignored