[ClusterLabs] Trying to understand the default action of a fence agent

[Christopher Lumens]

> The pacemaker CLI commands don't always say anything when invalid
> option combinations are used (fixing that is one of the many things on
> the "would-be-nice" list).

If you run into a nonsense option combination, file a bug and CC me on it
and I'll take a look at it.  I've been adding options here and there and
tried to make sure my new options error out as appropriate.  I'd like to
take care of existing options, too, but there's so many to just wade in
and tackle them all.

- Chris