Bug#633076: perl-base: needs to Break older versions of doc-base

[Niko Tyni]

Package: perl-base
Version: 5.12.4-1

Looking at

 http://bugs.debian.org/633016
 https://launchpad.net/bugs/781076
 http://patches.ubuntu.com/p/perl/perl_5.12.4-1ubuntu2.patch
 
we should probably do the same thing as Ubuntu and make perl-base Break
doc-base (<< 0.10.0) for upgrades from Squeeze.

This doc-base version switched its database format from MLDBM to YAML,
eliminating binary compatibility problems with MLDBM/Storable files.
-- 
Niko Tyni   ntyni at debian.org