Given the way config files can include other files, it is entirely
possible to use the same config file for both Pungi and Distill. Pungi
will however complain about unknown options.
This patch reverts part of c38bb480 and moves deprecation handling back
into schema validation. The validation method then returns a list of
errors and a list of warnings.
Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>
c338219ef0