fix: comprehensive boot warnings and exceptions — fixable silenced, unfixable diagnosed

Build system (5 gaps hardened):
- COOKBOOK_OFFLINE defaults to true (fork-mode)
- normalize_patch handles diff -ruN format
- New 'repo validate-patches' command (25/25 relibc patches)
- 14 patched Qt/Wayland/display recipes added to protected list
- relibc archive regenerated with current patch chain

Boot fixes (fixable):
- Full ISO EFI partition: 16 MiB → 1 MiB (matches mini, BIOS hardcoded 2 MiB offset)
- D-Bus system bus: absolute /usr/bin/dbus-daemon path (was skipped)
- redbear-sessiond: absolute /usr/bin/redbear-sessiond path (was skipped)
- daemon framework: silenced spurious INIT_NOTIFY warnings for oneshot_async services (P0-daemon-silence-init-notify.patch)
- udev-shim: demoted INIT_NOTIFY warning to INFO (expected for oneshot_async)
- relibc: comprehensive named semaphores (sem_open/close/unlink) replacing upstream todo!() stubs
- greeterd: Wayland socket timeout 15s → 30s (compositor DRM wait)
- greeter-ui: built and linked (header guard unification, sem_compat stubs removed)
- mc: un-ignored in both configs, fixed glib/libiconv/pcre2 transitive deps
- greeter config: removed stale keymapd dependency from display/greeter services
- prefix toolchain: relibc headers synced, _RELIBC_STDLIB_H guard unified

Unfixable (diagnosed, upstream):
- i2c-hidd: abort on no-I2C-hardware (QEMU) — process::exit → relibc abort
- kded6/greeter-ui: page fault 0x8 — Qt library null deref
- Thread panics fd != -1 — Rust std library on Redox
- DHCP timeout / eth0 MAC — QEMU user-mode networking
- hwrngd/thermald — no hardware RNG/thermal in VM
- live preload allocation — BIOS memory fragmentation, continues on demand

local/recipes/qt/qtwayland/source/tests/manual/scaling-compositor/CMakeLists.txt

@@ -0,0 +1,33 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+# Generated from scaling-compositor.pro.
+
+#####################################################################
+## scaling-compositor Binary:
+#####################################################################
+
+qt_internal_add_manual_test(scaling-compositor
+    GUI
+    SOURCES
+        main.cpp
+    LIBRARIES
+        Qt::Gui
+        Qt::Qml
+)
+
+# Resources:
+set(qml_resource_files
+    "main.qml"
+)
+
+qt_internal_add_resource(scaling-compositor "qml"
+    PREFIX
+        "/"
+    FILES
+        ${qml_resource_files}
+)
+
+
+#### Keys ignored in scope 1:.:.:scaling-compositor.pro:<TRUE>:
+# TEMPLATE = "app"

local/recipes/qt/qtwayland/source/tests/manual/scaling-compositor/main.cpp

@@ -0,0 +1,12 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <QtGui/QGuiApplication>
+#include <QtQml/QQmlApplicationEngine>
+
+int main(int argc, char* argv[])
+{
+    QGuiApplication app(argc, argv);
+    QQmlApplicationEngine engine(QUrl("qrc:/main.qml"));
+    return app.exec();
+}

local/recipes/qt/qtwayland/source/tests/manual/scaling-compositor/main.qml

@@ -0,0 +1,70 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+import QtQuick 2.15
+import QtQuick.Window 2.2
+import QtWayland.Compositor 1.3
+import QtWayland.Compositor.WlShell
+import QtWayland.Compositor.XdgShell
+
+WaylandCompositor {
+    id: comp
+    WaylandOutput {
+        id: output
+        compositor: comp
+        sizeFollowsWindow: true
+        scaleFactor: 2
+        window: Window {
+            id: win
+            width: 500
+            height: 500
+            visible: true
+            title: "Scaling compositor x" + output.scaleFactor
+
+            Repeater {
+                model: shellSurfaces
+                ShellSurfaceItem {
+                    shellSurface: modelData
+                    onSurfaceDestroyed: shellSurfaces.remove(index);
+                }
+            }
+
+            Rectangle {
+                id: incrementButton
+                color: "#c0f0d0"
+                Text {
+                    text: "+"
+                }
+                width: 100
+                height: 30
+                TapHandler {
+                    onTapped: ++output.scaleFactor
+                }
+            }
+
+            Rectangle {
+                id: decrementButton
+                color: "#f0d0c0"
+                Text {
+                    text: "-"
+                }
+                width: 100
+                height: 30
+                TapHandler {
+                    onTapped: output.scaleFactor = Math.max(1, output.scaleFactor - 1)
+                }
+                anchors.left: incrementButton.right
+            }
+        }
+    }
+
+    ListModel { id: shellSurfaces }
+
+    WlShell {
+        onWlShellSurfaceCreated: shellSurfaces.append({shellSurface: shellSurface});
+    }
+    XdgShell {
+        onToplevelCreated:
+            shellSurfaces.append({shellSurface: xdgSurface});
+    }
+}

local/recipes/qt/qtwayland/source/tests/manual/scaling-compositor/qml.qrc

@@ -0,0 +1,5 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource>
+    <file>main.qml</file>
+</qresource>
+</RCC>

local/recipes/qt/qtwayland/source/tests/manual/scaling-compositor/scaling-compositor.pro

@@ -0,0 +1,6 @@
+TEMPLATE = app
+
+QT += gui qml
+SOURCES += main.cpp
+
+RESOURCES += qml.qrc