Fixed bug caused by unknown header method.
Fixed bug caused by unknown header method.

* Updated Regexp to match no-cache directive more precisely

Signed-off-by: Ryan Tomayko <d1f05aa9451a08289b556bf689f87072a26bd23a@gmail.com>
dblock/rack-cache,mezis/rack-cache,dblock/rack-cache,mezis/rack-cache