7388 Support DHCP Client FQDN. Allow IAID/DUID for all v4.

*** 20,29 ****
--- 20,30 ----
   * CDDL HEADER END
   */
  /*
   * Copyright 1996-2003 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
+  * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
   */
  
  /*
   * dhcp.h - Generic DHCP definitions, as per RFC's 2131 and 2132.
   */
*** 155,166 ****
--- 156,174 ----
  
  /* Newer options */
  
  #define CD_SLPDA                78
  #define CD_SLPSS                79
+ #define CD_CLIENTFQDN   81
  #define CD_AGENTOPT             82
+ 
+ /*
+  * Per RFC 3679, option 89 was "Never published as standard and [is] not in
+  * general use". See active CD_CLIENTFQDN and RFC 4702.
+  */
  #define CD_FQDN                 89
+ 
  #define CD_PXEARCHi             93
  #define CD_PXENIIi              94
  #define CD_PXECID               95
  #define CD_MULTICST             107