$NetBSD$

A number of changes to make this build with no warnings under -Wall.

--- tftpyale.h.orig	1995-03-20 20:19:10.000000000 +0000
+++ tftpyale.h
@@ -24,6 +24,10 @@ extern int	dfltDebugLevel;
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#elif HAVE_STRERROR
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
 #else				/* not sane unix */
 
 #  ifdef __STDC__
