Bugfix #606592: Please unblock xen-qemu-dm-4.0

[Thomas Goirand <zigo@debian.org>]

Hi there,

My package was creating a symlink in /usr/lib/xen, and finally, I think
it was a bad idea (it broke some upgrades from Lenny in some servers of
mine in production). So I uploaded a fix that totally removes the
postinst of the package.

Note that I still think that Xen itself (the hypervisor) should be
maintaining such a symlink to /etc/alternatives/xen-default. I asked
already on the pkg-xen list to add this feature, but Bastian seems to
not agree with me. Never the less, managing this link in my own package,
just because the hypervisor doesn't, at the end of the day, I think it
was a bad idea anyway (and I did it wrongly, I should have use
update-alternatives).

So please unblock this trivial change.

Thomas Goirand (zigo)