switch to keypool?

[tpolecat]

The session pool is complicated and probably not 100% correct yet. Try switching to keypool while retaining the existing API.

[mpilquist]

Also look at #559

[mpilquist]

@tpolecat Do you recall the rationale for pool-party over keypool? I'd like to decide what to do with Pool before 1.0 final.

[tpolecat]

I think I just had something specific in mind and Keypool wasn't exactly what I was looking for. But it may work fine. No strong opinion.