The Start method will cause the channel to start listing for
local connections on LocalPort, if
channel type is LocalListen.
For channel type RemoteListen,
it will notify the server that it should start listening on RemotePort
and send notifications back to wodSSHTunnel for any connections
made on that port.
Upon successfully starting, the ChannelStart
event will be fired. The Start method may fail for several
reasons. Typically this happens when the port specified by LocalPort setting is already
in use by another application. If it fails, the ChannelStop
event will be fired with the error message explaining why
it failed to start.