[Pacemaker] Unnecessary shuffling of master/slave resources and maybe a split brain

[Dominik Klein]

> What are you saying me ? I should have another communication channel as 
> a COM port... I could test this with a null modem cable.

You need at least 2 connections between the nodes. It never was different.

It once was true that a null modem oder serial cable as the second 
connection was enough - from my _personal_ experience, having 2 ethernet 
connections is better (because faster and able to cope with the rather 
high traffic of v2 (pacemaker)).

Regards
Dominik