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/qtbase/source/examples/sql/sqlbrowser/qsqlconnectiondialog.cpp

@@ -0,0 +1,73 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "qsqlconnectiondialog.h"
+#include <ui_qsqlconnectiondialog.h>
+
+#include <QCheckBox>
+#include <QMessageBox>
+#include <QPushButton>
+#include <QSqlDatabase>
+
+QSqlConnectionDialog::QSqlConnectionDialog(QWidget *parent)
+    : QDialog(parent)
+    , m_ui{std::make_unique<Ui::QSqlConnectionDialogUi>()}
+{
+    m_ui->setupUi(this);
+
+    QStringList drivers = QSqlDatabase::drivers();
+
+    if (!drivers.contains("QSQLITE"))
+        m_ui->dbCheckBox->setEnabled(false);
+
+    m_ui->comboDriver->addItems(drivers);
+}
+
+QSqlConnectionDialog::~QSqlConnectionDialog()
+    = default;
+
+QString QSqlConnectionDialog::driverName() const
+{
+    return m_ui->comboDriver->currentText();
+}
+
+QString QSqlConnectionDialog::databaseName() const
+{
+    return m_ui->editDatabase->text();
+}
+
+QString QSqlConnectionDialog::userName() const
+{
+    return m_ui->editUsername->text();
+}
+
+QString QSqlConnectionDialog::password() const
+{
+    return m_ui->editPassword->text();
+}
+
+QString QSqlConnectionDialog::hostName() const
+{
+    return m_ui->editHostname->text();
+}
+
+int QSqlConnectionDialog::port() const
+{
+    return m_ui->portSpinBox->value();
+}
+
+bool QSqlConnectionDialog::useInMemoryDatabase() const
+{
+    return m_ui->dbCheckBox->isChecked();
+}
+
+void QSqlConnectionDialog::accept()
+{
+    if (m_ui->comboDriver->currentText().isEmpty()) {
+        QMessageBox::information(this, tr("No database driver selected"),
+                                 tr("Please select a database driver"));
+        m_ui->comboDriver->setFocus();
+    } else {
+        QDialog::accept();
+    }
+}