9718 update mandoc to 1.14.4

*** 1,9 ****
! /*      $Id: mandoc.c,v 1.103 2017/07/03 13:40:19 schwarze Exp $ */
  /*
   * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
!  * Copyright (c) 2011-2015, 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
   * copyright notice and this permission notice appear in all copies.
   *
--- 1,9 ----
! /*      $Id: mandoc.c,v 1.104 2018/07/28 18:34:15 schwarze Exp $ */
  /*
   * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
!  * Copyright (c) 2011-2015, 2017, 2018 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
   * copyright notice and this permission notice appear in all copies.
   *
*** 539,548 ****
--- 539,551 ----
              a2time(&t, "%b %d, %Y", in)) {
                  cp = time2a(t);
                  if (t > time(NULL) + 86400)
                          mandoc_msg(MANDOCERR_DATE_FUTURE, man->parse,
                              ln, pos, cp);
+                 else if (*in != '$' && strcmp(in, cp) != 0)
+                         mandoc_msg(MANDOCERR_DATE_NORM, man->parse,
+                             ln, pos, cp);
                  return cp;
          }
  
          /* In man(7), do not warn about the legacy format. */