LibIPC: Add IPC::MultiServer convenience class

This encapsulates what our multi-client IPC servers typically do on
startup:

    1. Create a Core::LocalServer
    2. Take over a listening socket file descriptor from SystemServer
    3. Set up an accept handler for incoming connections

IPC::MultiServer does all this for you! All you have to do is provide
the relevant client connection type as a template argument.

1 files changed, 2 insertions, 9 deletions

diff --git a/Userland/Services/ConfigServer/main.cpp b/Userland/Services/ConfigServer/main.cpp
index cde261b8a7..344e940a94 100644
--- a/Userland/Services/ConfigServer/main.cpp
+++ b/Userland/Services/ConfigServer/main.cpp
@@ -5,9 +5,9 @@
  */
 
 #include "ClientConnection.h"
-#include <LibCore/LocalServer.h>
 #include <LibCore/StandardPaths.h>
 #include <LibCore/System.h>
+#include <LibIPC/MultiServer.h>
 #include <LibMain/Main.h>
 
 ErrorOr<int> serenity_main(Main::Arguments)
@@ -18,13 +18,6 @@ ErrorOr<int> serenity_main(Main::Arguments)
 
     Core::EventLoop event_loop;
 
-    auto server = TRY(Core::LocalServer::try_create());
-    TRY(server->take_over_from_system_server());
-    server->on_accept = [&](auto client_socket) {
-        static int s_next_client_id = 0;
-        int client_id = ++s_next_client_id;
-        (void)IPC::new_client_connection<ConfigServer::ClientConnection>(move(client_socket), client_id);
-    };
-
+    auto server = TRY(IPC::MultiServer<ConfigServer::ClientConnection>::try_create());
     return event_loop.exec();
 }