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

*** 18,27 ****
--- 18,28 ----
   *
   * CDDL HEADER END
   */
  /*
   * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
   */
  
  #include <sys/types.h>
  #include <time.h>
  #include <netinet/in.h>
*** 460,469 ****
--- 461,473 ----
                  }
  
                  /* Add required Option Request option */
                  (void) add_pkt_prl(dpkt, dsmp);
  
+                 /* Add FQDN if configured */
+                 (void) dhcp_add_fqdn_opt(dpkt, dsmp);
+ 
                  return (send_pkt_v6(dsmp, dpkt, dsmp->dsm_server,
                      stop_extending, irt, mrt));
          } else {
                  dhcp_lif_t *lif = dsmp->dsm_lif;
                  ipaddr_t server;
*** 488,498 ****
                  /*
                   * dsm_reqhost was set for this state machine in
                   * dhcp_selecting() if the REQUEST_HOSTNAME option was set and
                   * a host name was found.
                   */
!                 if (dsmp->dsm_reqhost != NULL) {
                          (void) add_pkt_opt(dpkt, CD_HOSTNAME, dsmp->dsm_reqhost,
                              strlen(dsmp->dsm_reqhost));
                  }
                  (void) add_pkt_opt(dpkt, CD_END, NULL, 0);
  
--- 492,503 ----
                  /*
                   * dsm_reqhost was set for this state machine in
                   * dhcp_selecting() if the REQUEST_HOSTNAME option was set and
                   * a host name was found.
                   */
!                 if (dhcp_add_fqdn_opt(dpkt, dsmp) != 0 &&
!                     dsmp->dsm_reqhost != NULL) {
                          (void) add_pkt_opt(dpkt, CD_HOSTNAME, dsmp->dsm_reqhost,
                              strlen(dsmp->dsm_reqhost));
                  }
                  (void) add_pkt_opt(dpkt, CD_END, NULL, 0);