Let's shrink Packages.xz

[Jakub Wilk <jwilk@debian.org>]

Food for thought:
Which fields take up most space in Packages.xz[0]?

(whole file)       6662.0 KiB  100.0%
SHA256             1463.8 KiB   22.0%
SHA1                938.9 KiB   14.1%
Description-md5     794.3 KiB   11.9%
MD5sum              752.4 KiB   11.3%
Depends             473.0 KiB    7.1%
Description         463.4 KiB    7.0%
Filename            338.9 KiB    5.1%
Homepage            183.1 KiB    2.7%
Tag                 176.1 KiB    2.6%
Size                168.3 KiB    2.5%
Maintainer          161.3 KiB    2.4%
Installed-Size      144.6 KiB    2.2%
Package             134.5 KiB    2.0%
Version              73.4 KiB    1.1%
Suggests             68.9 KiB    1.0%
Recommends           63.7 KiB    1.0%


[0] More precisely: for each field, how much would Packages.xz shrink if 
we removed this (and only this) field?

--
Jakub Wilk