[Tagging] preproposal : internet webcam

[Pieren]

Adding a sub-tag will simply move the current 21700
man_made=surveillance elements without subtags in uncertainty.
I still think that a (public) webcam could be tagged differently from
a CCTV because it's not the same purpose and not the same legislation
even if it is a camera and may transit throught the net. One is
public, the other not.
May I suggest:
man_made=public_webcam
website=*    ('url' is deprecated in the wiki)

Pieren