Use new-style system-id macros everywhere possible.  I hope I haven't
missed any.

This compiles and runs on Linux, and external applications have no
problems with it.  The definite test will be to build this on VMS.
diff --git a/ssl/ssl_err2.c b/ssl/ssl_err2.c
index cc089a6..ea95a5f 100644
--- a/ssl/ssl_err2.c
+++ b/ssl/ssl_err2.c
@@ -62,7 +62,7 @@
 
 void SSL_load_error_strings(void)
 	{
-#ifndef NO_ERR
+#ifndef OPENSSL_NO_ERR
 	ERR_load_crypto_strings();
 	ERR_load_SSL_strings();
 #endif