Allow --no-keepalive to *actually* disable keep-alives in eventlet.wsgi.server
Allow --no-keepalive to *actually* disable keep-alives in eventlet.wsgi.server

Prior to a change (to be released in eventlet 0.9.3) lowering the
max_http_version really doesn't disable keep-alives if the client
asks for them.

With this change, Spawning *must* have eventlet 0.9.3 or higher installed

rtyler/Spawning