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_dsfield

@@ -0,0 +1,26 @@
+# Differentiated field values
+# These include the DSCP and unused bits
+0x0	default
+# Newer RFC2597 values
+0x28	AF11
+0x30	AF12
+0x38	AF13
+0x48	AF21
+0x50	AF22
+0x58	AF23
+0x68	AF31
+0x70	AF32
+0x78	AF33
+0x88	AF41
+0x90	AF42
+0x98	AF43
+# Older values RFC2474
+0x20	CS1
+0x40	CS2
+0x60	CS3
+0x80	CS4
+0xA0	CS5
+0xC0	CS6
+0xE0	CS7
+# RFC 2598
+0xB8	EF