[+ shotrcut method isTerminated() for VpnTunnel
[~] IpSecTunnel now uses isTerminated() shortcut
[~] OpenVpnTunnel now uses isTerminated() shortcut
[*] fixed a bug with missing onRevoke() call
[~] use isTerminated() shortcut
[+] added internal method removeTunnel() (draft, but works)
[~] added some log messages
[~] switching to epoll in router loop
[~] set field as null to be sure it will not be used again
[~] version increased