Extract ip/name resolver to a service

[DEvil0000]

I think it would make sense to extract the resolver code to have some kind of resolver/lookup service.
At the moment it is used to establish the connection but it could also be useful to map a host:port string to a Connection or Broker UID.
And in this case we need to resolve the thing in the Client and not the Connection.

Do you see a problem with this?

[danieljoos]

I wouldn't do that. The boost asio library already encapsulates the name resolving as a service and the library code just uses it. Why should we wrap another service around it. In my opinion, a Client implementation should not do name resolving. It should just use the Connection objects for that (also for fetching the meta data).