OSRM url length investigation.md

It's safe to stay < 2048 characters tofor URLs to stay compatible with IE 10.

https://stackoverflow.com/questions/417142/what-is-the-maximum-length-of-a-url-in-different-browsers

With hint

loc=38.89098272228586,-77.08927273750305&bearing=360,180&radius=unlimited&hint=oGOpAP____8uawoAAwAAABEAAAAUAAAABQAAACcHGwfM6QAASm5RAujBZ_sCAAEB

Length: 144
25 Waypoints: 3600

Without hint

loc=38.89098272228586,-77.08927273750305&bearing=360,180&radius=unlimited

Length: 74
25 Waypoints: 1850