Enable freeRADIUS 3 syncing
Enable freeRADIUS 3 syncing

When establishing a database replication, the appliance allows to sync the
freeRADIUS configuration as well. Since the paths for freeRADIUS 2.x were
hard-coded, this failed with ubuntu 18.04 and freeRADIUS 3.0.
This adds the syncing of the freeRADIUS 3.0 configuration as well.

Fixes #89

privacyidea/privacyidea-appliance,privacyidea/privacyidea-appliance