[9fans] new python posted

["Russ Cox" <rsc@plan9.bell-labs.com>]

the changes i remember:

better utf support

	>>> '☺'
	'☺'
	>>>

an implementation of the dial(2) routines

	>>> from plan9 import *
	>>> dial('tcp!sources.cs.bell-labs.com!9fs')
	(5, '/net/tcp/51', -1)
	>>> close(5)
	None
	>>>

a simulation of sockets above the dial routines

	>>> import _socket
	>>> s=_socket.socket()
	>>> s.connect(('sources.cs.bell-labs.com', 564))
	>>> s.close()
	>>>

the socket simulation is minimal but good enough to run the
various HTTPServer classes in /sys/lib/python

	% cd /tmp; python /sys/lib/python/SimpleHTTPServer.py
	...

the environment doesn't pick up extra nul bytes,
supports assignment, and knows about rc-style lists

	>>> from plan9 import *
	>>> environ['path']
	['.', '/bin']
	>>> environ['path'] = ['.', '/bin', '/tmp']

importing subclasses (subdirectories of /sys/lib/python)
works now too.

russ