Varnish was updated to 2.1.3. Improvements include better scalability and a new log function.
The main changes you can read here
httpd was updated from 2.2.14 to 2.2.16. This version includes mod and security fixes, and core change:
- Filter init functions are now run strictly once per request before handler invocation. The init functions are no longer run for connection filters.
For more information refer to http://www.apache.org/dist/httpd/CHANGES_2.2.