Proposal - drop the GPSD JSON driver

[Hal Murray]

esr at thyrsus.com said:
>> The SHM interface is deltas.  gpsd figures out the offset and sends that
>> over to ntpd.  How gpsd figures out that offset has nothing to do with SHM
>> or JSON or anything else involved with getting the data to ntpd.  The 
offset
>> won't change much in a short time so modest latency doesn't matter.

> Your last sentence is one of the assumptions we're now questioning.  I
> didn't question it before either, which is why the above hack is not
> implemented. 

We can test it with the current code.  Just setup ntpd to use both SHM and 
JSON.


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