9718 update mandoc to 1.14.4

*** 1,6 ****
! /*      $Id: tag.c,v 1.18 2017/02/17 14:31:52 schwarze Exp $ */
  /*
   * Copyright (c) 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
--- 1,6 ----
! /*      $Id: tag.c,v 1.19 2018/02/23 16:47:10 schwarze Exp $ */
  /*
   * Copyright (c) 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
*** 211,220 ****
--- 211,223 ----
                  entry = ohash_next(&tag_data, &slot);
          }
          ohash_delete(&tag_data);
          if (stream != NULL)
                  fclose(stream);
+         else
+                 close(tag_files.tfd);
+         tag_files.tfd = -1;
  }
  
  void
  tag_unlink(void)
  {