SimpleMachines/SMF2.1 — pull request #341 by jdarwood007 (2013-04-25 03:33:35+00:00)
Title: Add Frame Security Options header

I am starting with this one. This adds the ability for SMF to send a header to control frame options. All modern browsers support the basic functionality. Extended functionality to support ALLOW-FROM is not yet fully supported. Also mobile support seems to be unknown at this point. This improves SMF's security by preventing clickjacking.

https://developer.mozilla.org/en-US/docs/HTTP/X-Frame-Options