title: GraphHopper .jar only log Errors, Bad Requests, etc
body: <p>I'm using GrpahHopper's self hosted routing server <a href="https://graphhopper.com/public/releases/graphhopper-web-0.5.0-bin.zip" rel="nofollow">v0.5</a>, running on Ubuntu 15.10.</p>
  
  <p>The solution is run via a terminal with a jar file and arbitrary OSM data.</p>
  
  <p>Is there a way to control the logged output of the server (e.g. to only show exceptions, bad requests, etc.)?</p>