Merge last changes from apt--main--0.

Merge last changes from apt--main--0.
Merge last changes from apt--main--0.

Patches applied:

 * apt@packages.debian.org/apt--main--0--patch-79
   Merge michael.vogt@ubuntu.com--2005/apt--mvo--0

 * michael.vogt@ubuntu.com--2005/apt--mvo--0--patch-20
   * supress output when /var/cache/apt/archives is empty; break when min-age is reached

 * michael.vogt@ubuntu.com--2005/apt--mvo--0--patch-21
   * changed distro to "experimental", changed version number to 0.6.36