[Twisted-Python] "twistd web --port=9000" no longer works

[Itamar Turner-Trauring]

Apparently this was removed as part of deprecating the old strports 
syntax, but:

1) "twistd web --port=9000" never gave a deprecation warnings.

    itamar at blake:~$ twistd --version
    twistd (the Twisted daemon) 11.0.0
    Copyright (c) 2001-2011 Twisted Matrix Laboratories.
    See LICENSE for details.

    itamar at blake:~$ twistd -n web --port=9000 --path=/
    2012-03-17 20:50:21-0400 [-] Log opened.
    2012-03-17 20:50:21-0400 [-] twistd 11.0.0 (/usr/bin/python 2.7.2)
    starting up.
    2012-03-17 20:50:21-0400 [-] reactor class:
    twisted.internet.selectreactor.SelectReactor.
    2012-03-17 20:50:21-0400 [-] twisted.web.server.Site starting on 9000
    2012-03-17 20:50:21-0400 [-] Starting factory
    <twisted.web.server.Site instance at 0x180bd40>

2) The current --help just says " -p, --port=   strports description of 
the port to start the server on." It'll be completely unclear to users 
what that means.

I am tempted to revert the ticket that removed this functionality - can 
anyone tell me why we shouldn't?

In particular, before the removal should be re-merged again, the 
original syntax should be restored, along with decent --help. We should 
always support just giving the port number and defaulting to TCP. As it 
is, we've gone from a straightforward command line option that also had 
some sophisticated features to something that will break in a 
mysterious, hard to debug manner.
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