fallback_group now defaults to nogroup

tests/feudal_adapter.conf

@@ -26,7 +26,7 @@
 # group.
 # NOTE: This may not be intended, because groups usually reflect the
 # authorisation!
-# fallback_group = nogroup
+fallback_group = nogroup
 
 ### interactive  --  default: false
 # If true, user may be asked to choose a primary group or to