[Bug 1837] Build fails on Win7 due to regedit requiring privilege.

[Bug 1837] Build fails on Win7 due to regedit requiring privilege.
Provide fallback definitions for GetAdaptersAddresses() for Windows
  build environments lacking iphlpapi.h.
Rename file containing 1.xxxx ChangeSet revision from version to
  scm-rev to avoid invoking GNU make implicit rules attempting to
  compile version.c into version.  Problem was with sntp/version.o
  during make distcheck after fix for spurious sntp rebuilds.

bk: 4d65587ckwn64Ly42Oa7la8KQMlNIA