Feature Request: Add ability to configure a trusted reverse proxy server for the SBBS web server

Provide the ability to configure a trusted reverse proxy server for the SBBS web server, so that an administrator could identify a reverse proxy server by ip address and then trigger SBBS web server to start logging activity using the X-Forwarding-From header. The purpose of this feature is to allow the SBBS web server to log the external client IP address vs. the IP address of the reverse proxy server that is forwarding external clients.