http: fix many problems with url parsing and auth. added proxy test. problems fixed: - https scheme handled properly for real and proxy urls. - url of form "http://user:password@host:port/path" now ok. - no-proxy check uses proper host names.

port:4:export
port:4:vaportight
port:4:import/export
FIXME: history is wrong here
port:1:1:-:eggs:import
port:1:2:+:eggs:vaportight
port:1:3:+:eggs:import/export
port:0:2:+:spam:export
port:0:1:+:spam:import
port:4:import/export