* TODO: updated

* TODO: updated
* debian/rules: explicitly strip the setgid bit for debian/tmp-*.
  This is needed since the kernel copies it when we create subdirs
  and install doesn't strip it even though we explicitly ask for
  a mode 755 directory. Updated clean target to run make distclean
  to remove generated sourcefiles as well.
* dpkg-deb/build.c: add comments to describe what we are doing.
  Add code to get a list of files to be added to the archive, reorder
  it and feed it to tar and use this to put symlinks after all other
  files.
* scripts/dpkg-gencontrol.pl: add dpkg:Version and dpkg:UpstreamVersion
  to list of substvars