[Pacemaker] new doc about stonith/fencing

[Dejan Muhamedagic]

Hi,

Trying to make it a bit less mysterious, I wrote something about
fencing and stonith quite a while ago and then forgot to share
the link. Sorry about that.

Here it is:

http://www.clusterlabs.org/mediawiki/images/f/f2/Crm_fencing.pdf

As usual, constructive criticism/suggestions/etc are welcome.
I won't be able to read your impressions for the next two weeks,
but will sure look forward to see them afterwards.

Cheers,

Dejan