[Routing] Ferry routing

[Dennis Luxen]

>> So I fixed the pier issue (added highway=residential) on the map yesterday (before the OSRM update), but it still won't route across this particular ferry (I seem to have fixed the mapping problems w/ most of my other regular ferries).  Here's the one hold out:
>> http://map.project-osrm.org/ZM
>>
>> Am I missing something?
>
> The pier near the target does not yet seem to be in the OSRM data (
> you can try that by planning a route onto it, even one, that does not
> use a ferry ).

Right.

> The OSM data looks ok, so I would say, the change just hasn't made it
> into the routing data yet. Keep in mind, that OSRM is using the daily
> planet files, so it might be 2 days behind the database.

It's actually updateing by consuming the minutely diffs, so the lag is 
only a day.

--Dennis