Add X-Forwarded-For Header in SOAP request sent by LL::NG::Handler::AuthBasic
Now, when a user is authenticated by LL::NG::Handler::AuthBasic module, logged IP is that from the server running LL::NG::Handler::AuthBasic (since SOAP request to portal to authenticate user is sent from that server).
It would be nice to add a X-Forwarded-For Header in that SOAP request, containing client IP, possibly continuing an existing X-Forwarded-For header. So, if the server running LL::NG::Handler::AuthBasic is declared in Trusted proxies, logged IP is closer from real client IP.