6727 lofiadm: remove "o:" from getopt argument
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 23,32 ****
--- 23,33 ----
   * Use is subject to license terms.
   * Copyright 2012 Joyent, Inc.  All rights reserved.
   *
   * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
   * Copyright (c) 2014 Gary Mills
+  * Copyright (c) 2016 Andrey Sokolov
   */
  
  /*
   * lofiadm - administer lofi(7d). Very simple, add and remove file<->device
   * associations, and display status. All the ioctls are private between
*** 1830,1840 ****
          pname = getpname(argv[0]);
  
          (void) setlocale(LC_ALL, "");
          (void) textdomain(TEXT_DOMAIN);
  
!         while ((c = getopt(argc, argv, "a:c:Cd:efk:o:rs:T:U")) != EOF) {
                  switch (c) {
                  case 'a':
                          addflag = B_TRUE;
                          if ((filename = realpath(optarg, realfilename)) == NULL)
                                  die("%s", optarg);
--- 1831,1841 ----
          pname = getpname(argv[0]);
  
          (void) setlocale(LC_ALL, "");
          (void) textdomain(TEXT_DOMAIN);
  
!         while ((c = getopt(argc, argv, "a:c:Cd:efk:rs:T:U")) != EOF) {
                  switch (c) {
                  case 'a':
                          addflag = B_TRUE;
                          if ((filename = realpath(optarg, realfilename)) == NULL)
                                  die("%s", optarg);