follow yams api change: attributes permissions are now defined for
an 'update' action, no more 'add' / 'delete' which makes no sense in such case.
fix afs.relations_by_section permissions checking of object relation on the way.
add_relation_type('prefered_form')rql('SET X prefered_form Y WHERE Y canonical TRUE, X identical_to Y')commit()drop_attribute('EmailAddress','canonical')drop_relation_definition('EmailAddress','identical_to','EmailAddress')if'see_also'inschema:sync_schema_props_perms('see_also',syncprops=False,syncrdefs=False)