Bogon tag (and detailed address type identification)

[nitefood]

Just like for multicast addresses (which you already identify and tag accordingly), I'd like to suggest a bogon tag, along with more detailed address type identification (e.g. RFC1918 private space, or RFC6598 CGN space), to get rid of many unnecessary "unknown location" occurrances.

For example, these are some regex patterns I used for a similar purpose.

[GyulyVGC]

That's an amazing suggestion, thank you very much!

[GyulyVGC]

#209