Send the Connection: close response header
Send the Connection: close response header

so that proxy server don't try to reuse the connection. Given that
osrm-routed does *not* support keepalive the Connection: close response
header should be set.

arnekaiser/osrm-backend,raymond0/osrm-backend,hydrays/osrm-backend,arnekaiser/osrm-backend,felixguendling/osrm-backend,frodrigo/osrm-backend,KnockSoftware/osrm-backend,felixguendling/osrm-backend,neilbu/osrm-backend,yuryleb/osrm-backend,bjtaylor1/osrm-backend,neilbu/osrm-backend,KnockSoftware/osrm-backend,duizendnegen/osrm-backend,frodrigo/osrm-backend,bjtaylor1/osrm-backend,yuryleb/osrm-backend,beemogmbh/osrm-backend,Project-OSRM/osrm-backend,oxidase/osrm-backend,yuryleb/osrm-backend,bjtaylor1/osrm-backend,raymond0/osrm-backend,oxidase/osrm-backend,deniskoronchik/osrm-backend,beemogmbh/osrm-backend,Project-OSRM/osrm-backend,hydrays/osrm-backend,hydrays/osrm-backend,beemogmbh/osrm-backend,arnekaiser/osrm-backend,neilbu/osrm-backend,deniskoronchik/osrm-backend,duizendnegen/osrm-backend,KnockSoftware/osrm-backend,deniskoronchik/osrm-backend,Project-OSRM/osrm-backend,frodrigo/osrm-backend,neilbu/osrm-backend,oxidase/osrm-backend,bjtaylor1/osrm-backend,raymond0/osrm-backend,beemogmbh/osrm-backend,felixguendling/osrm-backend,deniskoronchik/osrm-backend,yuryleb/osrm-backend,KnockSoftware/osrm-backend,raymond0/osrm-backend,arnekaiser/osrm-backend,duizendnegen/osrm-backend,frodrigo/osrm-backend,duizendnegen/osrm-backend,hydrays/osrm-backend,oxidase/osrm-backend,Project-OSRM/osrm-backend