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/dhcpcd/hooks/29-lookup-hostname

@@ -0,0 +1,39 @@
+# Lookup the hostname in DNS if not set
+
+lookup_hostname()
+{
+	[ -z "$new_ip_address" ] && return 1
+	# Silly ISC programs love to send error text to stdout
+	if command -v dig >/dev/null 2>&1; then
+		h=$(dig +short -x $new_ip_address)
+		if [ $? = 0 ]; then
+			echo "$h" | sed 's/\.$//'
+			return 0
+		fi
+	elif command -v host >/dev/null 2>&1; then
+		h=$(host $new_ip_address)
+		if [ $? = 0 ]; then 
+			echo "$h" \
+			| sed 's/.* domain name pointer \(.*\)./\1/'
+			return 0
+		fi
+	elif command -v getent >/dev/null 2>&1; then
+		h=$(getent hosts $new_ip_address)
+		if [ $? = 0 ]; then
+			echo "$h" | sed 's/[^ ]* *\([^ ]*\).*/\1/'
+			return 0
+		 fi
+	fi
+	return 1
+}
+
+set_hostname()
+{
+	if [ -z "${new_host_name}${new_fqdn_name}" ]; then
+		export new_host_name="$(lookup_hostname)"
+	fi
+}
+
+if $if_up; then
+	set_hostname
+fi