r1984: * dh_installudev: Install udev rules directly into /etc/udev/rules.d/, not

r1984: * dh_installudev: Install udev rules directly into /etc/udev/rules.d/, not
  using the symlinks. MD has agreed that this is more appropriate for most
  packages.
* That fixes the longstanding bug that the symlink was only made on brand
  new installs of the package, rather than on upgrade to the first version
  that includes the udev rules file. Closes: #359614
* dh_installudev: Add preinst and postinst code to handle cleanly moving
  the rules file to the new location on upgrade.
* This would be a good time for the many packages that manage rules files
  w/o using dh_installudev to begin to use it..