Enable TCP_NODELAY

[edsko]

This is WIP, because setting TCP_NODELAY should be optional; for now we're just testing if this works at all.

Without TCP_NODELAY:

$ cabal run grapesy-kvstore -- --no-work-simulation
Did 11.433 RPCs/s

with:

$ cabal run grapesy-kvstore -- --no-work-simulation
Did 1778.667 RPCs/s

This is still nowhere near as good as the Java version

$ ./build/install/kvstore/bin/kvstore
Jul 04, 2024 11:44:24 AM io.grpc.examples.KvRunner runClient
INFO: Starting
Did 5183.583 RPCs/s

but at least no longer in "something must be badly wrong" territory.

Depends on

• Add functions to accept socket options kazu-yamamoto/network-run#8 (additional discussion in runTCPServerWithListenSocket kazu-yamamoto/network-run#7)
• Add settingsOpenClientSocket kazu-yamamoto/http2-tls#16

[edsko]

Obsoleted by #184 .