move patch servers to separate threads

src/Server.cc

@@ -134,6 +134,7 @@ void Server::connect_client(
   c->channel.on_command_received = Server::on_client_input;
   c->channel.on_error = Server::on_client_error;
   c->channel.context_obj = this;
+  this->state->channel_to_client.emplace(&c->channel, c);
 
   server_log.info(
       "Client connected: C-%" PRIX64 " on virtual connection %p via T-%hu-%s-%s-VI",
@@ -143,8 +144,6 @@ void Server::connect_client(
       name_for_enum(version),
       name_for_enum(initial_state));
 
-  this->state->channel_to_client.emplace(&c->channel, c);
-
   // Manually set the remote address, since the bufferevent has no fd and the
   // Channel constructor can't figure out the virtual remote address
   auto* remote_sin = reinterpret_cast<sockaddr_in*>(&c->channel.remote_addr);