Irccd: rework server to be simpler Server no longer has signals, now user is responsible of calling connect(), recv() and pass a completion handler. The recv function will complete with a std::variant of all possible events. The server does not manage itself anymore, the reconnection system has been moved to server_service instead. To simplify reconnection, the limit has been removed now you can only enable indefinite reconnection or disable it at all. closes #893 closes #892