[package] netifd: repair dhcp client id option

Busybox udhcpc dropped support for the -c option, instead it can be emulated by using -x 0x3d:id,
change the dhcp protocol script accordingly and filter all colons from the id while we're at it.
This change supersedes http://patchwork.openwrt.org/patch/1810/

SVN-Revision: 32573

diff --git a/package/netifd/files/lib/netifd/proto/dhcp.sh b/package/netifd/files/lib/netifd/proto/dhcp.sh
index 3365cb7aebc7da7507d843c543800b4dca834658..9182d58ad890fef4ea35ab38ea4429f10be09e73 100755 (executable)
--- a/package/netifd/files/lib/netifd/proto/dhcp.sh
+++ b/package/netifd/files/lib/netifd/proto/dhcp.sh
@@ -35,7 +35,7 @@ proto_dhcp_setup() {
                -f -t 0 -i "$iface" \
                ${ipaddr:+-r $ipaddr} \
                ${hostname:+-H $hostname} \
-               ${clientid:+-c $clientid} \
+               ${clientid:+-x 0x3d:${clientid//:/}} \
                ${vendorid:+-V $vendorid} \
                $broadcast $dhcpopts
 }