Turning off Reverse DNS lookup

[raghavf1]

Describe the bug I would like to disable reverse DNS lookups in PRPC platform to reduce amount of configuration required for supporting reverse DNS and also to minimize the impact it has on performance of requests served.

WebStandardImpl.makeEtierRequest(IWebStandard, HttpServletRequest, HttpServletResponse, Map, Object, DirectStreamWriter) has an intelligent way to fetch remote host only the first time when the session is established. It stores the host name in the http session when the session is established for the first time then it uses the value from session rather than resolving from request.

The issue is the value retrieved by makeEtierRequest is not being used at all the places in engine and resolving from request at other places. We can make change to retrieve the host value from session everywhere.

To Reproduce This is non-trivial to reproduce

Expected behavior n/a

Chart version n/a

Server (if applicable, please complete the following information): n/a

Additional context For internal reference, also see US-139237,BUG-256208