Allow RemoteSyslogChannel to be used again after being closed.

Net/src/RemoteSyslogChannel.cpp

@@ -89,6 +89,9 @@ void RemoteSyslogChannel::open()
 {
 	if (_open) return;
 
+    // reset socket for the case that it has been previously closed
+    _socket = DatagramSocket();
+
 	if (_logHost.find(':') != std::string::npos)
 		_socketAddress = SocketAddress(_logHost);
 	else
@@ -105,6 +108,8 @@ void RemoteSyslogChannel::open()
 			_host = _socket.address().host().toString();
 		}
 	}
+    
+    _open = true;
 }