openvpn:
 * fix openvpn doesn't work because of incorrect path to ip hardcoded at compile-time (changed in busybox 1.21.0)
 * fixes #2009
 * refs r10002


git-svn-id: file:///var/svn/freetz/trunk@10020 149334a1-2f27-0410-a3b9-fc62619ac1e6