Added config for showing connect/disconnect messages

core/src/mindustry/net/Administration.java

@@ -320,6 +320,7 @@ public class Administration{
         name("The server name as displayed on clients.", "Server", "servername"),
         port("The port to host on.", Vars.port),
         autoUpdate("Whether to auto-update and exit when a new bleeding-edge update arrives.", false),
+        showConnectMessages("Whether to display connect/disconnect messages.", true),
         startCommands("Commands run at startup. This should be a comma-separated list.", ""),
         crashReport("Whether to send crash reports.", false, "crashreport"),
         logging("Whether to log everything to files.", true),