Use "httpd24" package instead of "httpd"

The PHP 5.3 (package name: "php"), that installed by default works just fine with Apache 2.2 (package name: "httpd"). However when I try to install PHP 5.4 instead, then I've got yum conflicts.

To solve that I propose using "httpd24" package, that works pretty fine with PHP 5.4 version.

Since there are no contribution manual present in the repo I don't know how to run tests that verify that all works fine.