9718 update mandoc to 1.14.4

*** 1,6 ****
! /*      $Id: mdoc_markdown.c,v 1.23 2017/06/14 01:31:26 schwarze Exp $ */
  /*
   * Copyright (c) 2017 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: mdoc_markdown.c,v 1.24 2018/04/11 17:11:13 schwarze Exp $ */
  /*
   * Copyright (c) 2017 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
*** 292,302 ****
  md_node(struct roff_node *n)
  {
          const struct md_act     *act;
          int                      cond, process_children;
  
!         if (n->flags & NODE_NOPRT)
                  return;
  
          if (outflags & MD_nonl)
                  outflags &= ~(MD_nl | MD_sp);
          else if (outflags & MD_spc && n->flags & NODE_LINE)
--- 292,302 ----
  md_node(struct roff_node *n)
  {
          const struct md_act     *act;
          int                      cond, process_children;
  
!         if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
                  return;
  
          if (outflags & MD_nonl)
                  outflags &= ~(MD_nl | MD_sp);
          else if (outflags & MD_spc && n->flags & NODE_LINE)