Add netboot infrastructure: custom initramfs hooks, build scripts, iPXE configuration

initramfs/hooks/netboot

@@ -0,0 +1,38 @@
+#!/bin/sh
+#
+# Add useful binaries to initrd for netboot HTTP root mounting
+#
+
+if [ "$1" = "prereqs" ]; then
+	echo "udev"
+	exit
+fi
+
+. /usr/share/initramfs-tools/hook-functions
+
+# Essential utilities for netboot - copy_exec handles dependencies automatically
+copy_exec "/usr/bin/wget"
+copy_exec "/usr/bin/curl"
+copy_exec "/usr/bin/unsquashfs"
+copy_exec "/usr/sbin/switch_root"
+
+# Useful tools for debugging
+copy_exec "/usr/bin/awk"
+copy_exec "/usr/bin/bash"
+copy_exec "/usr/bin/chmod"
+copy_exec "/usr/bin/file"
+copy_exec "/usr/bin/free"
+copy_exec "/usr/bin/grep"
+copy_exec "/usr/bin/gunzip"
+copy_exec "/usr/bin/gzip"
+copy_exec "/usr/bin/less"
+copy_exec "/usr/bin/lsblk"
+copy_exec "/usr/bin/mount"
+copy_exec "/usr/bin/readlink"
+copy_exec "/usr/bin/sed"
+copy_exec "/usr/bin/timeout"
+copy_exec "/usr/bin/touch"
+copy_exec "/usr/bin/vi"
+
+# Note: copy_exec automatically handles all shared library dependencies via ldd()
+# No need to manually copy libc or other libraries - copy_exec handles this