Add TCP port reflecting the data stream read, perhaps NMEA only.

[gm8arv]

Having looked at other options, and rejected them, I'd like to make a
request for an addition to ubxtool: An option to make the data read
from the serial port available for other programs to read, local or
over the network.

New parameter such as:
--tcpout:

To test:
Telnet on a remote PC and expect to see a serial data stream.

To use:
u-center with the network port option:
tcp://:

Possible enhancement:
Pass NMEA data only to the TCP port.

I hope this would not be too difficult to implement. Thanks, David