fix: Switch to space-separated sources.conf format

- Change from colon to space separation to avoid URL parsing issues
- Update sources.conf format: TYPE NAME URL VERSION BUILD_FUNCTION [EXTRA]
- Implement awk-based parsing for reliable field extraction
- Fix firmware package list (remove unavailable linux-firmware-marvell)

initramfs/usr/share/iproute2/rt_tables

@@ -0,0 +1,11 @@
+#
+# reserved values
+#
+255	local
+254	main
+253	default
+0	unspec
+#
+# local
+#
+#1	inr.ruhep