New config feature - time1 can declare GPS wraparound compensation

[Eric S. Raymond]

I've just pushed a change that interprets a 'g' suffix on a clock time1
fudge option as an instruction to add the number of seconds in a 
1024-week GPS era. There can be more than one g. Using this, you can
compensate for era rollover in old GPS devices.

Credit to James Browning for the idea. It's actually done at the
scanner level, so it will work for other double-valued options such
as the time2 fudge - not that I expect that to be used.

If you have a GPS old enough to require wraparound compensation,
please test; I don't think I do anymore.

I've also updated the driver documentation, pointing out where this
option is likely to be of use, and the NEWS file.

Mark: once we've tested this it might merit a point release.
-- 
		<a href="http://www.catb.org/~esr/">Eric S. Raymond</a>

You know why there's a Second Amendment?  In case the government fails to
follow the first one.
         -- Rush Limbaugh, in a moment of unaccustomed profundity 17 Aug 1993