SSLProxyEngine is neither needed for http(s) redirects nor for non-SSL proxy configs.
Thus excluding it from these cases.

Based on a fix by Thom <thom@amsterdamtech.nl>

This reverts commit 0d61c249

This reverts merge request !1033

Change the name from proxy_protocol to use_proxy_protocol in vhost file due to site level overriding the check

tested both on apache2 and nginx with haproxy load balancer on TCP Mode

Added Global Setting to Server config tab to
  - Enable & Disable the feature
  - Set the Proxy HTTP & HTTPS Ports

Added Per site level switch to enable and disable feature (Located in the Web Tab under the advanced section)

Added Apache2 and Nginx vhost updates to enable proxy_protocol on the listen lines

Added New database column to web_domain called "proxy_protocol" to enable site level config (Patch file Added upd_0089.sql)

Updated the Base Table SQL file to include "proxy_protocol" field

The cipher suites are only set now for ISPConfig's own vhost, the intermediate security profile from Mozilla is used here.

Changed apache mod_proxy_fcgi configuration in vhost.conf.master from ProxyPassMatch to SetHandler so we can wrap the config directive it into <Directory ...> to avoid side affects with globally installed applications like phpmyadmin and roundcube.

After enabling "Rewrite HTTP to HTTPS" and "Lets Encrypt SSL" the RewriteCond and RewriteRule got on the same line, becourse of an failing newline