NMVPNConnection
@nmvpnconnection: the object which received the signal.
@arg1:
@arg2:
@parent:
@vpn_state_changed:
@_reserved1:
@_reserved2:
@_reserved3:
@_reserved4:
@_reserved5:
@_reserved6:
@connection:
@path:
@Returns:
@vpn:
@Returns:
@vpn:
@Returns: