Revert "6in4: Corrected tunnelbroker tunnel update URL"

The auth change appears to break the endpoint update for most users and with
my local tests the old update url works just fine.

This reverts commit 99c03a88cb6fed0519efdfaac305794653a12542.

SVN-Revision: 48384

package/network/ipv6/6in4/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=6in4
-PKG_VERSION:=23
+PKG_VERSION:=22
 PKG_RELEASE:=1
 PKG_LICENSE:=GPL-2.0
 

package/network/ipv6/6in4/files/6in4.sh

@@ -108,7 +108,7 @@ proto_6in4_setup() {
 			fi
 		}
 
-		local url="$http://$username:$password@ipv4.tunnelbroker.net/nic/update?hostname=$tunnelid"
+		local url="$http://ipv4.tunnelbroker.net/nic/update?username=$username&password=$password&hostname=$tunnelid"
 		local try=0
 		local max=3