9718 update mandoc to 1.14.4

*** 1,6 ****
! /*      $Id: libmandoc.h,v 1.70 2017/07/08 17:52:49 schwarze Exp $ */
  /*
   * Copyright (c) 2009, 2010, 2011, 2012 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: libmandoc.h,v 1.71 2018/04/09 22:27:04 schwarze Exp $ */
  /*
   * Copyright (c) 2009, 2010, 2011, 2012 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
*** 64,73 ****
                          const char *, int);
  void             roff_man_reset(struct roff_man *);
  enum rofferr     roff_parseln(struct roff *, int, struct buf *, int *);
  void             roff_endparse(struct roff *);
  void             roff_setreg(struct roff *, const char *, int, char sign);
! int              roff_getreg(const struct roff *, const char *);
  char            *roff_strdup(const struct roff *, const char *);
  int              roff_getcontrol(const struct roff *,
                          const char *, int *);
  int              roff_getformat(const struct roff *);
--- 64,73 ----
                          const char *, int);
  void             roff_man_reset(struct roff_man *);
  enum rofferr     roff_parseln(struct roff *, int, struct buf *, int *);
  void             roff_endparse(struct roff *);
  void             roff_setreg(struct roff *, const char *, int, char sign);
! int              roff_getreg(struct roff *, const char *);
  char            *roff_strdup(const struct roff *, const char *);
  int              roff_getcontrol(const struct roff *,
                          const char *, int *);
  int              roff_getformat(const struct roff *);