NFD

nfdc status report format xml command produces an XML document that

1. should conform to docs/_static/nfd-status.xsd schema;
2. is translatable with tools/nfd-status-http-server-files/nfd-status.xsl.

However, neither is tested.

This issue is to add a unit test or CI script that

1. invokes nfdc status report format xml command or its underlying functions to produce a XML document with various elements, covering every choice in schema and XSLT;
2. validates the XML document against the schema;
3. transforms the XML document to HTML with the XSLT;
4. validates the transformed document against HTML DTD.

The test does not cover the CSS stylesheet applied to the HTML document, or how the HTML document is rendered.