===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/mandoc/mdoc_validate.c,v
retrieving revision 1.264
retrieving revision 1.265
diff -c -r1.264 -r1.265
*** src/usr.bin/mandoc/mdoc_validate.c	2017/07/15 16:40:23	1.264
--- src/usr.bin/mandoc/mdoc_validate.c	2017/07/20 12:53:55	1.265
***************
*** 1,4 ****
! /*	$OpenBSD: mdoc_validate.c,v 1.264 2017/07/15 16:40:23 schwarze Exp $ */
  /*
   * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
--- 1,4 ----
! /*	$OpenBSD: mdoc_validate.c,v 1.265 2017/07/20 12:53:55 schwarze Exp $ */
  /*
   * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
   * Copyright (c) 2010-2017 Ingo Schwarze <schwarze@openbsd.org>
***************
*** 1408,1413 ****
--- 1408,1414 ----
  {
  	struct roff_node	*n;
  	const char		*os;
+ 	char			*v;
  
  	post_delim_nb(mdoc);
  
***************
*** 1424,1429 ****
--- 1425,1444 ----
  		break;
  	case MDOC_Nx:
  		os = "NetBSD";
+ 		if (n->child == NULL)
+ 			break;
+ 		v = n->child->string;
+ 		if ((v[0] != '0' && v[0] != '1') || v[1] != '.' ||
+ 		    v[2] < '0' || v[2] > '9' ||
+ 		    v[3] < 'a' || v[3] > 'z' || v[4] != '\0')
+ 			break;
+ 		n->child->flags |= NODE_NOPRT;
+ 		mdoc->next = ROFF_NEXT_CHILD;
+ 		roff_word_alloc(mdoc, n->child->line, n->child->pos, v);
+ 		v = mdoc->last->string;
+ 		v[3] = toupper((unsigned char)v[3]);
+ 		mdoc->last->flags |= NODE_NOSRC;
+ 		mdoc->last = n;
  		break;
  	case MDOC_Ox:
  		os = "OpenBSD";