Advance Wayland and KDE package bring-up

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/kde/kf6-kdbusaddons/source/autotests/kdbussimpleservice.cpp

@@ -0,0 +1,79 @@
+/*
+    This file is part of libkdbus
+
+    SPDX-FileCopyrightText: 2019 Harald Sitter <sitter@kde.org>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#include <QCoreApplication>
+#include <QDebug>
+#include <QThread>
+#include <kdbusservice.h>
+
+// sigaction
+#include <signal.h>
+// close
+#include <unistd.h>
+
+// rlimit
+#include <sys/resource.h>
+#include <sys/time.h>
+
+// USR1.
+// Close all sockets and eventually ABRT. This mimics behavior during KCrash
+// handling. Closing all sockets will effectively disconnect us from the bus
+// and result in the daemon reclaiming all our service names and allowing
+// other processes to register them instead.
+void usr1_handler(int signum)
+{
+    qDebug() << "usr1" << signum << SIGSEGV;
+
+    // Close all remaining file descriptors so we drop off of the bus.
+    struct rlimit rlp;
+    getrlimit(RLIMIT_NOFILE, &rlp);
+    for (int i = 3; i < (int)rlp.rlim_cur; i++) {
+        close(i);
+    }
+
+    // Sleep a bit for good measure. We could actually loop ad infinitum here
+    // as after USR1 we are expected to get killed. In the interest of sane
+    // behavior we'll simply exit on our own as well though.
+    sleep(4);
+    abort();
+}
+
+// Simple application under test.
+// Closes all sockets on USR1 and aborts to simulate a kcrash shutdown behavior
+// which can result in a service registration race.
+int main(int argc, char *argv[])
+{
+    qDebug() << "hello there!";
+
+    struct sigaction action;
+
+    action.sa_handler = usr1_handler;
+    sigemptyset(&action.sa_mask);
+    sigaddset(&action.sa_mask, SIGUSR1);
+    action.sa_flags = SA_RESTART;
+
+    if (sigaction(SIGUSR1, &action, nullptr) < 0) {
+        qDebug() << "failed to register segv handler";
+        return 1;
+    }
+
+    QCoreApplication app(argc, argv);
+    QCoreApplication::setApplicationName("kdbussimpleservice");
+    QCoreApplication::setOrganizationDomain("kde.org");
+
+    KDBusService service(KDBusService::Unique);
+    if (!service.isRegistered()) {
+        qDebug() << "service not registered => exiting";
+        return 1;
+    }
+    qDebug() << "service registered";
+
+    int ret = app.exec();
+    qDebug() << "exiting deadservice";
+    return ret;
+}