[SECURITY] Fedora 18 Update: php-symfony2-HttpKernel-2.1.6-1.fc18

HttpKernel provides the building blocks to create flexible and fast HTTP-based frameworks. It takes a Request as an input and should return a Response as an output. Using this interface makes your code compatible with all frameworks using the Symfony2 components. And this will give you many cool features for free. Optional dependencies: memcache, memcached, mongo