[PVE-User] Write access error changing VM state

[Dietmar Maurer]

> We have a two node cluster which I recently changed the network
> configuration (added a bridge) on both nodes, since then, whenever I
> try
> to start/stop/reboot any VM from a slave node I get this error:
> 
> "Error: You do not have write access. "

This behavior is intended! You have to use the master to 
start/stop virtual machines.

- Dietmar