6in4: fix typo in last commit

SVN-Revision: 35409

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

@@ -65,7 +65,7 @@ proto_6in4_setup() {
 		local max=3
 
 		while [ $((++try)) -le $max ]; do
-			( wget -qO/dev/null "$url" 2>/dev/null ) &
+			( exec wget -qO/dev/null "$url" 2>/dev/null ) &
 			local pid=$!
 			( sleep 5; kill $pid 2>/dev/null ) &
 			wait $pid && break