Version 1.4 of mod_wsgi can be obtained from:
1. A negative value for content length in response wasn’t being rejected. Where invalid header was being returned in response original response status was being returned instead of a 500 error.
2. Fix bug which was resulting in logging destined for !VirtualHost !ErrorLog going missing or ending up in main Apache error log.
1. Optimise sending of WSGI environment across to daemon process by reducing number of writes to socket. For daemon mode and a simple hello world application this improves base performance by 40% moving it significantly closer to performance of embedded mode.
This is a backport of change from version 2.0 of mod_wsgi.