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-kio/source/autotests/connectionbackendtest.cpp

@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: LGPL-2.0-or-later
+// SPDX-FileCopyrightText: 2024 Harald Sitter <sitter@kde.org>
+
+#include <cstdlib>
+
+#include <QSignalSpy>
+#include <QTest>
+
+#include <connectionbackend_p.h>
+
+class ConnectionBackendTest : public QObject
+{
+    Q_OBJECT
+private Q_SLOTS:
+    void testJumboPackets()
+    {
+        QSKIP("TODO testJumboPackets doesn't pass FIXME");
+
+        KIO::ConnectionBackend server;
+        KIO::ConnectionBackend clientConnection;
+
+        QVERIFY(server.listenForRemote().success);
+        auto spy = std::make_unique<QSignalSpy>(&server, &KIO::ConnectionBackend::newConnection);
+        QVERIFY(clientConnection.connectToRemote(server.address));
+        spy->wait();
+        QVERIFY(!spy->isEmpty());
+        auto serverConnection = std::unique_ptr<KIO::ConnectionBackend>(server.nextPendingConnection());
+        QVERIFY(serverConnection);
+
+        spy = std::make_unique<QSignalSpy>(&clientConnection, &KIO::ConnectionBackend::commandReceived);
+        constexpr auto cmd = 64; // completely arbitrary value we don't actually care about the command in this test
+        const auto data = randomByteArray(clientConnection.StandardBufferSize * 4L);
+        serverConnection->sendCommand(cmd, data);
+        spy->wait();
+        QVERIFY(!spy->isEmpty());
+
+        auto task = spy->at(0).at(0).value<KIO::Task>();
+        QCOMPARE(task.data.size(), data.size());
+    }
+
+private:
+    QByteArray randomByteArray(qsizetype size)
+    {
+        QByteArray data;
+        data.reserve(size);
+        for (int i = 0; i < size; i++) {
+            data.append(std::rand() % std::max(1, std::numeric_limits<char>::digits10));
+        }
+        return data;
+    }
+};
+
+QTEST_MAIN(ConnectionBackendTest)
+
+#include "connectionbackendtest.moc"