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* Allow setting X-FRAME-OPTIONS This PR provides a mechanism to set the X-FRAME-OPTIONS header. Fix #7951 Signed-off-by: Andrew Thornton <art27@cantab.net> * Update docs/content/doc/advanced/config-cheat-sheet.en-us.md Co-authored-by: John Olheiser <john.olheiser@gmail.com> Co-authored-by: John Olheiser <john.olheiser@gmail.com>