Issue:Option to only run DPL from protected pages

Description:	Protect your wiki from DPL abuse. E.g. "$wgProtectedDPL" as option to let DPL run only from protected pages.
Extension / Version:	DPL   /   ?
Type / Status:	Change Request   /   open

Problem

Note: I talk about an option, not a must.
Some wiki admins may not like the idea that other users can run DPL from any page. E.g. I'm paranoid, somebody copies all my content, so I disabled all Export features etc.

An option to give the full control to the admin is by letting DPL code only run from protected pages. Extension:SecureHTML uses it and it is so simple & safe at the same time. Advantages with "$wgProtectedDPL":

• To protect a page you have to be an administrator, i.e.
• Normal users cannot create pages with DPL code
• Normal users cannot manipulate existing DPL code, because they can't edit the page

The last one is also possible without this new feature but with "$wgProtectedDPL" they simply can't do things the admin didn't allow with his DPL functions.

It may not seem to be important for you but surely for other wikis with sensible data.