Switch from explode to strpos to check the route
Switch from explode to strpos to check the route

The use of strpos() is faster than explode (see this gist:
https://gist.github.com/365af63a41797d9cf705) so since the code
is ran every dispatch cylce, it should be as fast as possible.

Hounddog/ZfcAdmin,juriansluiman/ZfcAdmin,ZF-Commons/ZfcAdmin,ZF-Commons/ZfcAdmin