9718 update mandoc to 1.14.4

*** 1,6 ****
! /*      $Id: roff.h,v 1.58 2017/07/08 14:51:05 schwarze Exp $   */
  /*
   * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2013, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
--- 1,6 ----
! /*      $Id: roff.h,v 1.59 2018/04/11 17:11:13 schwarze Exp $   */
  /*
   * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2013, 2014, 2015, 2017 Ingo Schwarze <schwarze@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
*** 59,68 ****
--- 59,69 ----
          ROFFT_HEAD,
          ROFFT_BODY,
          ROFFT_TAIL,
          ROFFT_ELEM,
          ROFFT_TEXT,
+         ROFFT_COMMENT,
          ROFFT_TBL,
          ROFFT_EQN
  };
  
  enum    roff_tok {