Add a macro __MKTEMP_OK__ that renames mktemp() to _mktemp() for uses that

have been checked, so that the linker does not warn us. There are valid
uses for mktemp() such as for creating filenames that are going to be
targets of the rename system call. Discussed with lukem.

include/stdlib.h

@@ -1,4 +1,4 @@
-/*	$NetBSD: stdlib.h,v 1.69 2005/02/03 04:39:32 perry Exp $	*/
+/*	$NetBSD: stdlib.h,v 1.70 2005/06/11 22:58:42 christos Exp $	*/
 
 /*-
  * Copyright (c) 1990, 1993
@@ -179,9 +179,11 @@ void	 srandom(unsigned long);
 
 char	*mkdtemp(char *);
 int	 mkstemp(char *);
-#ifndef __AUDIT__
-char	*mktemp(char *);
+char	*mktemp(char *)
+#ifdef __MKTEMP_OK__
+	__RENAME(_mktemp)
 #endif
+	;
 
 int	 setkey(const char *);