[Twisted-Python] policies.py change in 2.0

[Tommi Virtanen]

Glyph Lefkowitz wrote:
>> In fact this change actually breaks the Twisted smtp.py code.
> Wow.  That does look broken.  I suggest that if nobody explains this by 
> the end of the day that the change be reverted right away...

Blame spiv.

[0 tv at tao ~/src/twisted/trunk]$ svn log -v -r13494
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r13494 | spiv | 2005-04-07 17:33:58 +0300 (Thu, 07 Apr 2005) | 1 line
Changed paths:
    M /trunk/twisted/protocols/ftp.py
    M /trunk/twisted/protocols/policies.py
    M /trunk/twisted/test/test_ftp.py
    M /trunk/twisted/test/test_policies.py

Refactor untested connection-limiting from FTP server to 
twisted.protocols.policies.LimitTotalConnectionsFactory, with tests.
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