Description of problem:

This was originally reoprted as bug #444979 and splitted:

Preupgrade should consider the case in which the upgrade is done *remotely*,
via ssh (really, this is the *main* reason for which one attempts to upgrade a
system via yum and not via bootable media).

So preupgrade will need a way to complete the upgrade *without human
intervention after reboot*. The scenario is:

- the administrator logs remotely, as root, to the (functional) system to be
upgraded via "ssh -X system.example.com"
- the administrator invokes preupgrade
- the system reboots
- the upgrade should be completed without user intervention


  
Actual results:
There is no way to perform upgrades via preupgrade *remotely*, via ssh, without local user intervention (console).

Expected results:
Preupgrade should provide a way to complete upgrades remotely (via ssh only).