Setting the SERVER_PROTOCOL to HTTP/1.1 in centOS

Question

I want to set the http SERVER_PROTOCOL as HTTP/1.1 in my CentOS system. The system is currently configured with Apache/2.2.15 and PHP/5.4.10. But the PHP info file in my server shows as:

SERVER_PROTOCOL     HTTP/1.0 

How to change it to:

SERVER_PROTOCOL     HTTP/1.1