Log Message:
Update to 2.38.  patch-ac and patch-ad (security fix to listen only on
localhost) were merged upstream.

* Tue Feb 10 Eric S. Raymond <esr@snark.thyrsus.com> - 2.38
  Regression test load for RoyalTek RGM3800 and Blumax GPS-009 added.
  Scaling on E error-estimate fields fixed to match O. Listen on
  localhost only by default to avoid security problems; this can be
  overridden with the -G command-line option. The packet-state machine
  can now recognize RTCM3 packets, though support is not yet complete.
  Added support for ublox5 and mkt-3301 devices. Add a wrapper around
  gpsd_hexdump to save CPU. Lots of little fixes to various packet
  parsers. Always keep the device open: "-n" is not optional any more.
  xgpsspeed no longer depends on Motif. gpsctl can now ship arbitrary
  payloads to a device. It's possible to send binary through the
  control channel with the new "&" command. Experimental new driver
  for Novatel SuperStarII. The 'g' mode switch command now requires,
  and returns, 'rtcm104v2' rather than 'rtcm104'; this is design forward
  for when RTCM104v2 is fully working.