throw a warning when naxsi is enabled in an internal location

[buixor]

naxsi does not parse requests to internal location (to avoid loops and other weird things).
However it would be cool to throw a warning when this happens.

[buixor]

The warning will be thrown once at the first request that hits the internal location.
I could do this at every request, but it's - at most - just a clever way to fill up logs ?

Sadly, we can't do it at config time :/

[jvoisin]

• How can one issue a request to an internal location?
  • This is documented here
• What kind of decision would the admin take upon such a notification?

[buixor]

Naxsi will simply not treat a request that is tagged as "internal" (because of re-entrant aspect of nginx).
So it means the admin must configure naxsi so that the request is processed before the request is tagged as internal. It might be changed in the future to allow an admin to specifically allow this behavior. For now, we just want to throw a warning in the logs.

[buixor]

Commited a fix attempt a548d60 let's see :)