* new dependency: libnginx-mod-http-headers-more-filter
* security headers in _general.conf (inherited to all vhosts)
* scheme-dependent Strict-Transport-Security header in nginx.conf
* forced text/html MIME type to the nginx.conf static messages
* preparation of a static web service in nginx.conf
* preparation of static certificates in configs folder and nginx.conf
* missing } in nginx.conf