The archive now supports xz compression

[Ansgar Burchardt]

Hi,

The archive software now accepts packages using xz for compression in
addition to gzip and bzip2 for both source and binary packages.

Please remember that packages in the base system[1] (and dependencies)
*must* currently use gzip as otherwise debootstrap will be unable to
install a system.

Additionally please only use xz (or bzip2 for that matter) if your
package really profits from its usage (for example, it provides a
significant space saving). While those methods may compress better they
often use more CPU time to do so and a very small decrease in package
size is hardly worth the extra effort placed on slower systems. Think of
both user systems and the Debian buildds which will waste more time - an
especially bad problem on slower architectures.

Regards,
Ansgar, for the FTP Team

1: Meaning everything with Priority: required.