network: Unbind DHCPv6 from underlying interfaces

This allows IPv6 to set up without IPv4 being up thus
IPv6-only or IPv6+DS-Lite working with the default config.

Signed-off-by: Steven Barth <steven@midlink.org>

SVN-Revision: 42848

package/base-files/files/bin/config_generate

@@ -62,7 +62,7 @@ EOF
 set network.$1.proto='dhcp'
 delete network.wan6
 set network.wan6='interface'
-set network.wan6.ifname='@wan'
+set network.wan6.ifname='$ifname'
 set network.wan6.proto='dhcpv6'
 EOF
 		;;

package/base-files/files/etc/config/network

@@ -14,9 +14,5 @@ config interface lan
 	option netmask	255.255.255.0
 	option ip6assign 60
 
-config interface wan6
-	option ifname	@wan
-	option proto	dhcpv6
-
 config globals globals
 	option ula_prefix auto

package/base-files/files/lib/functions/uci-defaults.sh

@@ -190,7 +190,7 @@ set network.wan='interface'
 set network.wan.ifname='$ifname'
 set network.wan.proto='dhcp'
 set network.wan6='interface'
-set network.wan6.ifname='@wan'
+set network.wan6.ifname='$ifname'
 set network.wan6.proto='dhcpv6'
 EOF
 }