Fixed port numbers (SWF_PORT, POLICY_PORT, WEB_PORT)

[foobarlab]

An instance has these preset 'standard' ports:

swf_port = 7230
web_port = 8081
policy_port = 3000

It is not possible to start an instance on other ports without breaking loading a stage.

Obviously these ports are read from multiple different configurations and those interfere:

client: Transport.as, Client.as: use Client.POLICY_PORT instead of evaluating the given url parameters

server: pages.py: variable vars uses the Config.POLICY_PORT and Config.SWF_PORT instead of the given port numbers by the starting command

It is rather expected that not configuration is involved but just the commandline arguments specifying these ports. A configuration could only be used for setting default values in case no commandline argument is given.

[foobarlab]

Apparently the static variables on the server python code in config.py get overwritten, so this kind of behaviour remains a smell.

Transport.as and Client.as have been fixed in commit ddb59a50a054fdc103ea5a9d9cd8dfa50a3e86b1.