Adress pain points for server initialization

[LDSpits]

Currently, when you initialize the server. The Init method blocks until the server is terminated. However, this makes terminating the server programmatically difficult. Consider this example:

TcpServer server = new TcpServer(...);

server.Init();
server.Stop(); // <-- you never reach this

apart from this issue, there is also a papercut with the API:

• Init. Is unintuitive. People will probably not expect this to actually start the server, maybe we can use a different name? (like Start?)

we need an alternative design to properly handle the lifetime of the server. We can use this issue for discussion.