[EXT] Some updates on CVE user registry

[Kurt Seifried-2]

So my initial work on testing the CVE user registry within the DWF has started:

https://github.com/distributedweaknessfiling/DWF-CVE-User-Registry/

One major note for MITRE on the old CNA registry side (which lists all the CVE blocks https://github.com/distributedweaknessfiling/DWF-CNA-Registry): 

2019 changes

For 2019 the CSV files no longer use the "DWFCNA_0" identity but use the GUID (please see https://github.com/distributedweaknessfiling/DWF-CVE-User-Registry/tree/master/data for information).

Long term my DWF-CNA-Registry CSV files listing CVE blocks will be replaced by the CVE allocation service (hopefully, right?). 

Happy new years all.

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