swat: Use X-Frame-Options header to avoid clickjacking
Jann Horn reported a potential clickjacking vulnerability in SWAT where
the SWAT page could be embedded into an attacker's page using a frame or
iframe and then used to trick the user to change Samba settings.
Avoid this by telling the browser to refuse the frame embedding via the
X-Frame-Options: DENY header.
Signed-off-by: Kai Blin <kai@samba.org>
Fix bug #9576 - CVE-2013-0213: Clickjacking issue in SWAT.
(cherry picked from commit
71225948a249f079120282740fcc39fd6faa880e)