[Twisted-Python] bugs

[Chris Armstrong]

Ok, i've found the following bugs while figuring out why my personal
webserver is not working.

1) in daemon mode, twistd is closing oldstdout, which later is needed if
an exception is raised. (there's a traceback print on oldstdout)

2) skt.bind() in twisted/internet/tcp.py will fail if ~/.twisted-web-pb exists.
I guess when the server is shut down it should delete this file.

3) Something else, after working around these two bugs, is preventing the
personal webservers to work.