[SSSD] [PATCHES] remove "legacy" option

[Simo Sorce]

The "legacy" option was introduced to speed up development.
It is actually confusing and not necessary.
> From now on we store all using the member/memberof schema internally.
(Tested only with the native ldap driver).

0001 mainly converts the core sysdb functions
0002 fixes many errors in fill_grent and removes legacy support form
there
0003 adds an upgrade function to convert existing databases on the first
run.

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York