DOCBOOK-APPS: PassiveTex & XMLTex packages for Debian

[This is mostly just of interest to people using Debian.]

Fabien Ninoles has announced[1] that he has successfully packaged
PassiveTeX and XMLTeX for Debian and made the packages available at:

  http://www.tzone.org/~fabien/debian/

They're not available from the Testing distribution yet, actually not
even apt-gettable yet, but a couple of people on the debian-sgml list
responded to say that they seem to install and work correctly.

[1] http://lists.debian.org/debian-sgml/2002/debian-sgml-200208/msg00021.html