WIP to help bringup NAT flows

*** 254,263 ****
--- 254,265 ----
  extern void     *udp_kstat2_init(netstackid_t stackid);
  extern void     udp_kstat2_fini(netstackid_t, kstat_t *);
  
  extern void     udp_stack_cpu_add(udp_stack_t *, processorid_t);
  
+ extern in_port_t udp_update_next_port(udp_t *, in_port_t, boolean_t);
+ 
  /*
   * Object to represent database of options to search passed to
   * {sock,tpi}optcom_req() interface routine to take care of option
   * management and associated methods.
   */