Problem with B1 signal on NEO-F10N

[jclark]

Doing satpulsetool gps --gnss BDS on a NEO-F10N gets an error from the receiver.

What happens is:

• satpulse does a wildcard read of CFG-SIGNAL-* properties
• this includes s CFG-SIGNAL-BDS_B1_ENA
• satpulse infers that the the NEO-F10N supports BDS B1 (usually this is a safe inference: receivers don't have keys for signals they don't support)
• satpulse accordingly sends a message enabling BDS B1, B1C and B2A
• the receiver rejects this because it doesn't actually support BDS B1

I don't think there is any way to figure out what signals it does actually support without having hard-coded knowledge.

Maybe the best fix is #97