No string changes have occurred.

Also fix some debug message levels

Add a way to make changes to the most recent format of config
files. Use it to remove all traces of Data Provider from the config file
which is being migrated.

Fix copy/paste error that picked up the wrong request structure to pass down.
This was causing the talloc code that checks for the right signature to fail and
abort as the 2 request structures have different state structures attacched.

Also remove references to the DP service from the sssd.conf
manpages.

This rewrite should also fix a segfault in the code that may happen when
exiting in case of error conditions. The previous code was attaching the
transaction handle to llreq structure and then calling prepare_reply() from
within the request handlers which could ultimately free the preq and
llreq and handle before the transaction request was actually completed
by tevent.

If the pointer stays around, zero it when it is freed, so we do not risk
access to released memory in case of bugs.

Configuration files before 0.5.0 did not enforce provider= in local
domains it did special-case by domain name (LOCAL). Our script was
relying on provider= value, this patch adds the special-casing in case
the domain was called LOCAL.

Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>