Removes X-Content-Security-Policy from Apache examples
Removes X-Content-Security-Policy from Apache examples

Content-Security-Policy is the new standard header.
https://www.owasp.org/index.php/Content_Security_Policy

ageis/securedrop,ehartsuyker/securedrop,ageis/securedrop,conorsch/securedrop,micahflee/securedrop,heartsucker/securedrop,ehartsuyker/securedrop,ageis/securedrop,garrettr/securedrop,ehartsuyker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,heartsucker/securedrop,conorsch/securedrop,ehartsuyker/securedrop,garrettr/securedrop,micahflee/securedrop,ehartsuyker/securedrop,garrettr/securedrop,ageis/securedrop,conorsch/securedrop,conorsch/securedrop,garrettr/securedrop,micahflee/securedrop,heartsucker/securedrop,micahflee/securedrop,heartsucker/securedrop,heartsucker/securedrop