This is read-only property that will return total number of
currently open remote port forwarding connections through
wodSSHServer. This value will be increased when user opens new port
forwarding, and
PortForwardConnect event fires. It will be decreased when uses
closes port forwarding, and
PortForwardDisconnect event fires.
Since this is remote-port forwarding - meaning remote server
listens for incoming connections and forwards them to local service
that also listens,
PortBindRequest
event will be fired also before above two events.