DRBD: fix (outside) proxy indicators in the graph
DRBD: don't add proxy host to the graph when hw info is updated
DRBD: add proxy connect/disconnect menu items
DRBD: show if proxy is up, if not connected to the proxy hosts
DRBD: enable/disable proxy menu items, depending on their availability
DRBD: don't show the error if proxy is not running
fix possible npe
fix locking of hw resouce nodes
fix timestamp being unparsable in some cases
DRBD: fix warning about multiple proxy ports accross the hosts
DRBD: fix start/stop proxy tooltip
DRBD: add proxy info to the host info