Add a new property "IgnoreSessionRemoteIP" for HTTP-Server

[asschilling40]

Problem: Entra/Azure Proxy Application and Session Handling

My Indy HTTP server is published through an Entra/Azure Application Proxy service.
This proxy-service is connected via three local Application Proxy Connector servers to the local network
and the internal web application.

The issue arises because the proxy service changes the proxy connector server with each access,
causing the Indy server to create a new session on every request due to the changing client IP
(remote IP). As a result, all session data is discarded.

Solution: To resolve this, session handling should be based solely on the session ID, rather than the client IP.

[rlebeau]

You can use the TIdHTTPServer.OnCreateSession event, or derive a new class from TIdHTTPCustomSessionList, to create new sessions that ignore client IPs. The client IP is used by default only if you don't create your own session first.