Fix detection for all "Red Hat versions"

Using globbing for detection on Red Hat distros since there are
a couple of them out there (RedHatEnterpriseServer,
RedHatEnterpriseWorkstation, RedHatEnterpriseClient and who knows).
Using RedHat* should be pretty safe to detect atleast every
Red Hat-version.
Merge pull request #30 from patchon/master

Fix detection for all "Red Hat versions".