[SSSD][DESIGN] ID mapping - Automatically assign new slices for any AD domain

[Pavel Reichl]

Hello,

I decided to share this design document although it still a work in progress. Attached
patches are just prove of concept and are very much work in progress. So far patches also
defers from design in order in which secondary slices are generated.

Thanks for feedback on this early state of effort.

Bye.

https://fedorahosted.org/sssd/wiki/IdmapAutoAssignNewSlices