OS-2204 SunSSH has a maximum of 10 multiplexed sessions

*** 23,32 ****
--- 23,37 ----
   */
  /*
   * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
+ /*
+  * Copyright (c) 2013, Joyent, Inc.  All rights reserved.
+  */
+ 
+ #include "sys-queue.h"
  
  #ifndef _SESSION_H
  #define _SESSION_H
  
  #ifdef __cplusplus
*** 35,45 ****
  
  /*      $OpenBSD: session.h,v 1.19 2002/06/30 21:59:45 deraadt Exp $    */
  #define TTYSZ 64
  typedef struct Session Session;
  struct Session {
!         int     used;
          int     self;
          struct passwd *pw;
          Authctxt *authctxt;
          pid_t   pid;
          /* tty */
--- 40,50 ----
  
  /*      $OpenBSD: session.h,v 1.19 2002/06/30 21:59:45 deraadt Exp $    */
  #define TTYSZ 64
  typedef struct Session Session;
  struct Session {
!         LIST_ENTRY(Session) list_entry;
          int     self;
          struct passwd *pw;
          Authctxt *authctxt;
          pid_t   pid;
          /* tty */