Bug 1902 - TDE logind multiseat patch port

Francios, Slavek,

I have ported the kde-workspace-4.11.0-kdm-logind-multiseat.patch to tdebase. The code fit like a glove showing that there had been very little change to kdm in kde4. I was able to find the exact context for each hunk and I manually applied the hunks to the relevant tdebase files. I need you to look over the patch and make sure it looks sane. Let me know if you see anything out of place.

I will attempt a tdebase build, test if successful and will report back. Patch attached.