Add configuration options to HTTP server

[vtnerd]

No description provided.

[selsta]

What would be a scenario where someone changes rpc-response-soft-limit?

[selsta]

This seems to break multiple functional tests, not sure if it's the IP limit or the response size limit.

[iamamyth]

The RPC client used in those tests does a poor job of connection management: Depending on the exact version of the requests library in use, it either opens and closes a new connection for every request (recent versions of the library), or re-uses a global, "default" session, which makes it tricky to clean up. I'd check the IP limit, and also, it might be appropriate to exempt local subnets.

Edit: Based on the trace and the build setup, I expect the connection per request behavior.