- get rid of %pre/%post logic that fixes the old packaging bug. Turns out
%pretrans and %posttrans had their purpose before, because the logic needed
to run before old files owned by the package got deleted. But I'm not
reimplementing this strange logic in Lua ... users that didn't get the fix
yet will have to live with it.

- fix a potential tss user to root privilege escalation when running tcsd
(bsc#1164472). To do this run tcsd as the 'tss' user right away to prevent
badly designed privilege drop and initialization code to run.
- add bsc1164472.patch: additionally harden operation of tcsd when running as
root. No longer follow symlinks in /var/lib/tpm. Drop gid to tss main group.
require /etc/tcsd.conf to be owned by root:tss mode 0640.

- add correct Requires(pre) and change %pretrans and %posttrans into %pre and
%post. %pretrans can't have any dependencies and therefore can only be
%implemented in lua. This currently leads to build errors "/bin/sh: no such
file or directory".