Incorrect IP to stdout on startup

[Kevsy]

Summary

Kolibri indicates the server is listening on 0.0.0.0:8080 on startup. This is not RFC 1122 compliant and is causing confusion to OpCos. Please can this be changed to the IP (or IPs):8080?

System information

Please specify the Kolibri version you were using and your operating system!

• Version: kolibri-vf-v0.3.1
• Operating system: Ubuntu
• Browser: N/A

Traceback or relevant snippet from server.log or browser console

How to reproduce

1. Start Kolibri
2. Read the resulting stdout 'Engine serving on...' message

Real-life consequences (anything community should be aware of, for instance how it affects your deployment)

Confusion from network admins who cannot access that IP - per RFC 1122, 'This host on this network. MUST NOT be sent, except as a source address as part of an initialization procedure by which the host learns its own IP address.' So any attenpt to access via a browser or other box will fail, as both proxys and routers will drop packets addressed this way.

[benjaoming]

This is already solved in KA Lite with ifcfg, which is a third-party library we're the maintainers of on PyPi: https://github.com/ftao/python-ifcfg

I've updated so it doesn't depend on ifconfig anymore, but it would be nice to make it Windows compatible, too... so we don't need this (from KA Lite):

    if system.lower() in ["linux", "darwin", "macosx"]:
        # on Linux and OSX, use the ifcfg library to wrap ifconfig
        ips = [iface.get("inet") for iface in ifcfg.interfaces().values()]
    elif system.lower() == "windows":
        # on Windows, run ipconfig and parse the output
        ipconfig = os.popen("ipconfig /all").read()
        ips = [match[1] for match in re.findall("IP(v4)? Address[\.\: ]+([\d\.]+)", ipconfig)]
    else:
        ips = []

[benjaoming]

As suggested by @rtibbles we might add a command kolibri url to display the URLs of the server.

[rtibbles]

Fixed in #1929