Control over node.js http/https agent?

[natevw]

The current node.js http Agent kinda sucks due to lack of actual keep-alive except under heavy load (when requests get queued, which it also seems to suck at).

This is a bummer, and mostly beyond the scope of Fermata, but highlights that it might be necessary (I didn't say "nice") to allow some platform-specific control over transport options. Ick?