AsyncClient overwrites http_session after disconnect

[JoriDubrovin]

The AsyncClient constructor takes a http_session parameter for customizing the aiohttp.ClientSession. This works for the first connection, but if the client is disconnected, then upcoming connections overwrite the session by a fresh aiohttp.ClientSession(), losing the customizations.

Should http_session be e.g. a function that constructs ClientSessions instead?

[miguelgrinberg]

I'll see if the original session can be preserved, so that a function isn't necessary.