$NetBSD$

Add NetBSD support.

--- error.c.orig	Wed May  1 16:59:23 2002
+++ error.c
@@ -65,7 +65,12 @@ void xplerr2(int err, String s1, String 
     pxplerr(msg);
 }
 
+#if !defined(__NetBSD__)
+/*
+ * NetBSD has sys_errlist defined in errno.h
+ */
 extern const char *const sys_errlist[];
+#endif
 
 static void psyserr(String s)
 {
