+ proto_config_add_string "noslaaconly"
+ proto_config_add_string "forceprefix"
+ proto_config_add_string "norelease"
+ proto_config_add_string "ip6prefix"
+ proto_config_add_string "iface_dslite"
+ proto_config_add_string "ifaceid"
+ proto_config_add_string "sourcerouting"