[Pacemaker] Last chance to object to the syntax for cluster tickets (multi-site clusters)

[Andrew Beekhof]

We're about to lock in the syntax for cluster tickets (used for
multi-ste clusters).

The syntax rules are at:
  https://github.com/gao-yan/pacemaker/commit/9e492f6231df2d8dd548f111a2490f02822b29ea

And its use, along with some examples, can be found here:
   https://github.com/gao-yan/pacemaker/commit/5f75da8d99171cc100e87935c8c3fd2f83243f93

If there are any comments/concerns, now is the time to raise them.

-- Andrew