Add fix for --auth-token fix with --management
    
    When using NetworkManager-openvpn, it adds --auth-nocache.  It was
    discovered that when using --management with --auth-nocache, it
    does not properly handle the server pushed --auth-token.  On tunnel
    renegotiations it requires the user to re-enter the token value;
    which is unknown to the end-user.
    
    The attached patch cleans up this and OpenVPN will correct this
    and not bother the user with new credentials when the server
    pushes --auth-token and the management interface is used.