OS-4300 increase RT signal count
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 20,29 ****
--- 20,30 ----
   */
  
  /*
   * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright 2015, Joyent, Inc.
   */
  
  /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  /*        All Rights Reserved   */
  
*** 93,103 ****
  #define SIGJVM2 40      /* reserved signal for Java Virtual Machine */
  #define SIGINFO 41      /* information request */
  
  /* insert new signals here, and move _SIGRTM* appropriately */
  #define _SIGRTMIN 42    /* first (highest-priority) realtime signal */
! #define _SIGRTMAX 73    /* last (lowest-priority) realtime signal */
  extern long _sysconf(int);      /* System Private interface to sysconf() */
  #define SIGRTMIN ((int)_sysconf(_SC_SIGRT_MIN)) /* first realtime signal */
  #define SIGRTMAX ((int)_sysconf(_SC_SIGRT_MAX)) /* last realtime signal */
  
  #if     defined(__cplusplus)
--- 94,104 ----
  #define SIGJVM2 40      /* reserved signal for Java Virtual Machine */
  #define SIGINFO 41      /* information request */
  
  /* insert new signals here, and move _SIGRTM* appropriately */
  #define _SIGRTMIN 42    /* first (highest-priority) realtime signal */
! #define _SIGRTMAX 74    /* last (lowest-priority) realtime signal */
  extern long _sysconf(int);      /* System Private interface to sysconf() */
  #define SIGRTMIN ((int)_sysconf(_SC_SIGRT_MIN)) /* first realtime signal */
  #define SIGRTMAX ((int)_sysconf(_SC_SIGRT_MAX)) /* last realtime signal */
  
  #if     defined(__cplusplus)