Currently if we set 'postreboot' in the Cobbler ks_meta for a system, then it will be rebooted at the end of the Anaconda %post section. We need this for s390 systems, where the post_s390_reboot snippet is not reliable. (We can therefore just drop that snippet too.)
On Gerrit: http://gerrit.beaker-project.org/1086
Beaker 0.9.0 has been released.