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/qtdeclarative/source/src/particles/qquickrectangleextruder_p.h

@@ -0,0 +1,57 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef RECTANGLEEXTRUDER_H
+#define RECTANGLEEXTRUDER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qquickparticleextruder_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class Q_QUICKPARTICLES_EXPORT QQuickRectangleExtruder : public QQuickParticleExtruder
+{
+    Q_OBJECT
+    Q_PROPERTY(bool fill READ fill WRITE setFill NOTIFY fillChanged)
+    QML_NAMED_ELEMENT(RectangleShape)
+    QML_ADDED_IN_VERSION(2, 0)
+
+public:
+    explicit QQuickRectangleExtruder(QObject *parent = nullptr);
+    QPointF extrude(const QRectF &) override;
+    bool contains(const QRectF &bounds, const QPointF &point) override;
+    bool fill() const
+    {
+        return m_fill;
+    }
+
+Q_SIGNALS:
+
+    void fillChanged(bool arg);
+
+public Q_SLOTS:
+
+    void setFill(bool arg)
+    {
+        if (m_fill != arg) {
+            m_fill = arg;
+            Q_EMIT fillChanged(arg);
+        }
+    }
+protected:
+    bool m_fill;
+};
+
+QT_END_NAMESPACE
+
+#endif // RectangleEXTRUDER_H