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/libs/libevdev/source/doc/html/testing.html

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+<div><div class="header">
+  <div class="headertitle"><div class="title">libevdev-internal test suite</div></div>
+</div><!--header-->
+<div class="contents">
+<div class="textblock"><p>libevdev's internal test suite uses the <a href="http://check.sourceforge.net/">Check unit testing framework</a>. Tests are divided into test suites and test cases. Most tests create a uinput device, so you'll need to run as root, and your kernel must have <code>CONFIG_INPUT_UINPUT</code> enabled.</p>
+<p>To run a specific suite only: </p><pre class="fragment">export CK_RUN_SUITE="suite name"
+</pre><p> To run a specific test case only: </p><pre class="fragment">export CK_RUN_TEST="test case name"
+</pre><p> To get a list of all suites or tests: </p><pre class="fragment">git grep "suite_create"
+git grep "tcase_create"
+</pre><p> By default, Check forks, making debugging harder. The test suite tries to detect if it is running inside gdb and disable forking. If that doesn't work for some reason, run gdb as below to avoid forking. </p><pre class="fragment">sudo CK_FORK=no CK_RUN_TEST="test case name" gdb ./test/test-libevdev
+</pre><p> A special target <code>make gcov-report.txt</code> exists that runs gcov and leaves a <code>libevdev.c.gcov</code> file. Check that for test coverage.</p>
+<p><code>make check</code> is hooked up to run the test and gcov (again, needs root).</p>
+<p>The test suite creates a lot of devices, very quickly. Add the following xorg.conf.d snippet to avoid the devices being added as X devices (at the time of writing, mutter can't handle these devices and exits after getting a BadDevice error). </p><pre class="fragment">$ cat /etc/X11/xorg.conf.d/99-ignore-libevdev-devices.conf
+Section "InputClass"
+        Identifier "Ignore libevdev test devices"
+        MatchProduct "libevdev test device"
+        Option "Ignore" "on"
+EndSection
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