Hey there again!

I noticed, the man-pages `sssd.conf` and `sssd-ldap` are inconsistent in the capitalization of some values:

• `True`, `true`, `TRUE`
• `False`, `false`, `FALSE`
• `None`, `none`

In `SSSDConfig`, some cases are treated equally, but not all: https://github.com/SSSD/sssd/blob/ad7dc210f79e9b521ff26449d10a0348debff4a8/src/config/SSSDConfig/__init__.py.in#L79-L82

Similarly, sometimes its called `ad` or `AD`

This inconsistency is confusing and reduces confidence whether SSSD actually recognizes the configuration and does the intended thing.

I am using RHEL 9.5 with SSSD version `2.9.5`, release `4.el9`. If this is a duplicate, please ignore this.