WIP to help bringup NAT flows

*** 174,185 ****
  static mblk_t   *udp_prepend_header_template(conn_t *, ip_xmit_attr_t *,
      mblk_t *, const in6_addr_t *, in_port_t, uint32_t, int *);
  static void     udp_ud_err(queue_t *q, mblk_t *mp, t_scalar_t err);
  static void     udp_ud_err_connected(conn_t *, t_scalar_t);
  static void     udp_tpi_unbind(queue_t *q, mblk_t *mp);
- static in_port_t udp_update_next_port(udp_t *udp, in_port_t port,
-     boolean_t random);
  static void     udp_wput_other(queue_t *q, mblk_t *mp);
  static void     udp_wput_iocdata(queue_t *q, mblk_t *mp);
  static void     udp_wput_fallback(queue_t *q, mblk_t *mp);
  static size_t   udp_set_rcv_hiwat(udp_t *udp, size_t size);
  
--- 174,183 ----
*** 2651,2661 ****
   * Since the extra privileged ports can be arbitrary we also
   * ensure that we exclude those from consideration.
   * us->us_epriv_ports is not sorted thus we loop over it until
   * there are no changes.
   */
! static in_port_t
  udp_update_next_port(udp_t *udp, in_port_t port, boolean_t random)
  {
          int i, bump;
          in_port_t nextport;
          boolean_t restart = B_FALSE;
--- 2649,2659 ----
   * Since the extra privileged ports can be arbitrary we also
   * ensure that we exclude those from consideration.
   * us->us_epriv_ports is not sorted thus we loop over it until
   * there are no changes.
   */
! in_port_t
  udp_update_next_port(udp_t *udp, in_port_t port, boolean_t random)
  {
          int i, bump;
          in_port_t nextport;
          boolean_t restart = B_FALSE;