Fix 1831 - bicycle lane can be a regular lane

[Famlam]

Although common, bicycle:lanes=designated does not necessarily mean a cycleway=lane (/half-width lane). Hence, rather than forcing an exact match, allow the bicycle:lanes to count or not to count. Most countries seem to be unaffected.

I purposefully didn't add a cycleway=* check but went for this more generic approach, because the cycleway=*share* approach would be very problematic:

1. cycleway=share* on a oneway with oneway:bicycle=no is somewhat ambiguous, cycleway:left=opposite_share* is very ambiguous
2. It'll fail in case there's a cycleway=lane and a designated shared regular lane at the same time (e.g. at a turn)
3. It's 100% limited to bicycles, can't be expanded like the remainder of the half-width lane code to other narrow vehicles if desired in the future
4. It'd require a lot more code to deal with cycleway=share* / cycleway:both / cycleway:left / cycleway_right conversions (+ oneway and oneway:bicycle cases)
5. In some countries, cycleway=shared_lane refers to a half-width lane, in others to a full width lane, so we need this code anyway

Deals with #1831

As the majority of the cases the text about half/full width cases is correct, I did not modify the text message.