Updated to use setTtl
Updated to use setTtl

Previous version set Cache-Control s-maxage headers explicitly which is
not enough to trigger ESI caching in the reverse proxy. Using setTtl is
enough to make this work correctly.

romainneutron/Silex,mTorres/Silex,tcx1000/Silex,akucherevskiy/developex_test,CarsonF/Silex,JPry/Silex,Incognito/silex-fork,GromNaN/Silex,SanderKnape/Silex,CarsonF/Silex,Tobion/Silex,Xephi/Silex,peterkokot/Silex,lokhman/Silex,cesarmarinhorj/Silex,naderman/Silex,RayRutjes/Silex,lyrixx/Silex,naderman/Silex,plotek/Silex,cgsmith/Silex,plotek/Silex,mmauri04/Silex,RayRutjes/Silex,lyrixx/Silex,Tobion/Silex,romainneutron/Silex,arduanov/Silex,jdreesen/Silex,peterkokot/Silex,gencer/Silex,fabpot/Silex,cesarmarinhorj/Silex,GromNaN/Silex,romainneutron/Silex,JPry/Silex,akucherevskiy/developex_test,akucherevskiy/developex_test,SpacePossum/Silex,mmauri04/Silex,fabpot/Silex,GromNaN/Silex,jdreesen/Silex,Tobion/Silex,beealone/Silex,Incognito/silex-fork,lyrixx/Silex,beealone/Silex,mathroc/Silex,tcx1000/Silex,SpacePossum/Silex,CarsonF/Silex,fhinkel/Silex,naderman/Silex,fhinkel/Silex,arduanov/Silex,SanderKnape/Silex,mTorres/Silex,mathroc/Silex,Xephi/Silex,lokhman/Silex,peterkokot/Silex,cgsmith/Silex,silexphp/Silex