Compatibility with whisper v6 (#6179)

* compatibility with whisper v6

* separate subprotocol for parity extensions

* kill version field

rpc/Cargo.toml

@@ -62,5 +62,8 @@ hash = { path = "../util/hash" }
 clippy = { version = "0.0.103", optional = true}
 pretty_assertions = "0.1"
 
+[dev-dependencies]
+ethcore-network = { path = "../util/network" }
+
 [features]
 dev = ["clippy", "ethcore/dev", "ethcore-util/dev", "ethsync/dev"]

rpc/src/v1/tests/mocked/manage_network.rs

@@ -15,6 +15,9 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use ethsync::{ManageNetwork, NetworkConfiguration};
+use self::ethcore_network::{ProtocolId, NetworkContext};
+
+extern crate ethcore_network;
 
 pub struct TestManageNetwork;
 
@@ -27,4 +30,5 @@ impl ManageNetwork for TestManageNetwork {
 	fn start_network(&self) {}
 	fn stop_network(&self) {}
 	fn network_config(&self) -> NetworkConfiguration { NetworkConfiguration::new_local() }
+	fn with_proto_context(&self, _: ProtocolId, _: &mut FnMut(&NetworkContext)) { }
 }