Fix #10 issue with URLs with extension being considered like the default page extension
Fix #10 issue with URLs with extension being considered like the default page extension

With this change, the plugin does not cache the page if called with an
extension different than the default page extension. Cannot cache
because then the page content type is always text/html while a RSS feed
for example is another content type.

getgrav/grav-plugin-advanced-pagecache