added some missing use statements in the security docs (closes #445)
added some missing use statements in the security docs (closes #445)

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