SWF-2577 : Use include to avoid apache configuration duplication for instances
SWF-2577 : The frontend is either HTTP or HTTPS only (not dual mode)
SWF-2577 : Remove scheme from ServerName
SWF-2577 : Instance Apache configuration files with HTTPS
SWF-2577 : Add DEPLOYMENT_APACHE_HTTPS_ENABLED (default false) to activate HTTPS on a given instance