[Tagging] Proposition for a classification of path

[Balaitous]

> Also, the proposed path types would classify any path that ends in a cul-de-sac as the least-used and least-maintained category, which isn't necessarily the case.

When I say "cul-de-sac" I refer to paths that go nowhere, like this :

http://www.openstreetmap.org/browse/way/166766130
http://www.openstreetmap.org/browse/way/169660967

At the beginning, there look good, but there are more and more bad, and
at the end there simply disappear !

I have corrected :
"This path can be end in cul de sac without any POI."