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_protos

@@ -0,0 +1,26 @@
+#
+# Reserved protocols.
+#
+0	unspec
+1	redirect
+2	kernel
+3	boot
+4	static
+8	gated
+9	ra
+10	mrt
+11	zebra
+12	bird
+13	dnrouted
+14	xorp
+15	ntk
+16	dhcp
+18	keepalived
+42	babel
+84	ovn
+99	openr
+186	bgp
+187	isis
+188	ospf
+189	rip
+192	eigrp