initram: unpack apkovl with --numeric-owner

fixes #23

initramfs-init

@@ -75,7 +75,7 @@ unpack_apkovl() {
 	fi
 
 	for i in $ALPINE_MNT/*/*/openssl-[0-9]*.apk $ALPINE_MNT/*/openssl-[0-9]*.apk; do
-		[ -f "$i" ] && tar -C / -zxf $i && break
+		[ -f "$i" ] && tar --numeric-owner -C / -zxf $i && break
 	done
 
 	if ! openssl list-cipher-commands | grep "^$suffix$" > /dev/null; then
@@ -86,8 +86,8 @@ unpack_apkovl() {
 	# beep
 	echo -e "\007"
 	while [ $count -lt 3 ]; do
-		openssl enc -d -$suffix -in "$ovl" | tar -C "$dest" -zx \
-			2>/dev/null && return 0
+		openssl enc -d -$suffix -in "$ovl" | tar --numeric-owner \
+			-C "$dest" -zx 2>/dev/null && return 0
 		count=$(( $count + 1 ))
 	done
 	return 1