Change issue tracker to upstream one.
Change issue tracker to upstream one.

Update the issue tracker link in configure.ac to point to the upstream
one (in the chronokings repository), not to my personal Github.

Also bump the copyright year to 2018.  While that will come later with
more upstream merges, we do have 2018 modifications in the code now.

domob1812/huntercore,domob1812/huntercore,domob1812/huntercore,domob1812/huntercore,domob1812/huntercore,domob1812/huntercore