Host discovery is not really working in Windows

[gpolo]

Although it uses ipconfig, commands.getouput doesn't work on that platform. A good solution is to substitute by subprocess.Popen.

[gpolo]

The currently used patterns for finding addresses will only work when using ifconfig -- this is another big reason for not getting expected results under Windows

[gpolo]

By the way, it may also not work under unix if the ifconfig output uses a language different from English.

I will be doing this in a more robust way.

[gpolo]

Fixed in r4200