Pattern-based Registrations

[boenrobot]

Spec reference: https://wamp-proto.org/wamp_latest_ietf.html#section-11.8

Thruway already supports prefix matching for subscriptions, but it doesn't seem to support them for RPC register calls.

It should either support them, or at least return an error when an unknown matcher is requested in RPC register calls. Not returning an error makes the behaviour unexpected by a client that does support this, such as Autobahn-js.