[Twisted-Python] Twisted's ability to handle many open connections.

[Itamar Shtull-Trauring]

> On Windows, there is a reactor that supports a maximum of 63
> concurrent events (assuming your process has no windows open).  On
> UNIX the default reactor is still select() based and will definitely
> bog down if you have too many simultaneous sockets open.  Sometimes it
> is handled quite badly!

But default win32 reactor has 512 maximum.