4736 spamming zlogin with SIGINT will halt the target zone

*** 552,564 ****
   */
  static void
  sig_forward(int s)
  {
          if (child_pid != -1) {
!                 pid_t pgid = getpgid(child_pid);
!                 if (pgid != -1)
!                         (void) sigsend(P_PGID, pgid, s);
          }
  }
  
  /*
   * reset terminal settings for global environment
--- 552,562 ----
   */
  static void
  sig_forward(int s)
  {
          if (child_pid != -1) {
!                 (void) sigsend(P_PGID, child_pid, s);
          }
  }
  
  /*
   * reset terminal settings for global environment