Link Connection Types "udpin" and "updout" to "UDP Client" and UDP Server"

[rmackay9]

I think it would be better to rename the "udpin" and "updout" Connection types to the more standard "UDP Client" and "UDP Server" nomenclature. It's not a huge deal but for people who are new to networking (including myself) the non-standard words make me stop and pause and wonder which is which.

Similarly "tcpin" and "tcp" should probably be renamed to "TCP Server" and "TCP Client" respectively

[stephendade]

Definitions are in pymavlink (https://github.com/ArduPilot/pymavlink/blob/master/mavutil.py#L1887), so we'd need to add the extra definitions there.

We'd also need to edit ./modules/lib/wx_addlink.py to update the GUI parts of MAVProxy.

Agree it'd be a sensible thing to do. I sometimes get confused too :)