DRBD: add drbd proxy options configuration
Merge branch 'master' into dp
DRBD: return localhost as net interface for drbd proxy
DRBD: add drbd proxy resource configuration
DRBD: add drbd proxy resource configuration (2)
cleanup: split functions
DRBD: fix proxy value initialization
VM: make tightvnc the default VNC viewer in Windows
GUI: cancel sudo dialog in one session
GUI: don't use sudo for "ip" command
PCMK: don't use corosync status commands in hb clusters and vice versa

so they don't need to be allowed for sudo
GUI: use the same sudo pwd in the sequence of commands
add commands to README needed for sudo
GUI: ask for sudo password if it failed

in some configurations the root password is needed for sudo
DRBD: add tooltips to the network/port fields
DRBD: make inside proxy address an advanced field
DRBD: show and hide proxy config, depending on proxy configuration
DRBD: change port label if it is used for proxy
DRBD: remove warning abount unsupported DRBD proxy
DRBD: change how the proxy panels are displayed