Changing require_once to require for custom session handlers.  If you are using a class to do your custom session handling you must include checks to prevent duplicate class errors.  Fixes #324
Changing require_once to require for custom session handlers.  If you are using a class to do your custom session handling you must include checks to prevent duplicate class errors.  Fixes #324

ndm2/cakephp,kumamidori/cakephp,yinhe007/cakephp,tenkoma/cakephp,davidyell/cakephp,jeffblack360/cakephp,jeffblack360/cakephp,tenkoma/cakephp,erikfig/cakephp,burriko/cakephp,akintoey/cakephp,Phillaf/cakephp,cakephp/cakephp,adopico/cakephp,thinkingmedia/cakephp,et304383/passbolt_api,jjj117/cakephp,bravo-kernel/cakephp,dakota/cakephp,pbaire/cakephp,HavokInspiration/cakephp,petteyg/cakephp,khoimt/cakephp-study,nrother/cakephp,CakeDC/cakephp,tisu2tisu/cakephp,davidyell/cakephp,eboominathan/cakephp,tisu2tisu/cakephp,ionas/cakephp,gmponos/cakephp,ndm2/cakephp,thinkingmedia/cakephp,gmponos/cakephp,HavokInspiration/cakephp,yinhe007/cakephp,garethellis36/cakephp,CakeDC/cakephp,burriko/cakephp,CVO-Technologies/cakephp,cakephp/cakephp,mvdriel/cakephp,jjj117/cakephp,CakeDC/cakephp,adopico/cakephp,dkarvounaris/cakephp,cakephp/cakephp,Balachan27/cakephp,tgr0ss/cakephp,yinhe007/cakephp,eryw/cakephp,burriko/cakephp,Phillaf/cakephp,ADmad/cakephp,gmponos/cakephp,eboominathan/cakephp,eryw/cakephp,garethellis36/cakephp,mvdriel/cakephp,nrother/cakephp,Balachan27/cakephp,justinyost/cakephp,ndm2/cakephp,Phillaf/cakephp,berrygoudswaard/cakephp,dakota/cakephp,timhoeppner/cakephp,ADmad/cakephp,erikfig/cakephp,pbaire/cakephp,et304383/passbolt_api,akintoey/cakephp,mvdriel/cakephp,pbaire/cakephp,michaelze/cakephp,elboletaire/cakephp,michaelze/cakephp,web-player/cakephp,Balachan27/cakephp,garethellis36/cakephp,khoimt/cakephp-study,berrygoudswaard/cakephp,justinyost/cakephp,bravo-kernel/cakephp,jerems02/cakephp,jjj117/cakephp,ndm2/cakephp,adopico/cakephp,eryw/cakephp,erikfig/cakephp,dkarvounaris/cakephp,kumamidori/cakephp,timhoeppner/cakephp,cakephp-fr/cakephp,berrygoudswaard/cakephp,jerems02/cakephp,elboletaire/cakephp,tgr0ss/cakephp,cakephp/cakephp,CVO-Technologies/cakephp,ADmad/cakephp,ionas/cakephp,tgr0ss/cakephp,CakeDC/cakephp,davidyell/cakephp,dkarvounaris/cakephp,HavokInspiration/cakephp,kumamidori/cakephp,khoimt/cakephp-study,web-player/cakephp,petteyg/cakephp,dakota/cakephp,nrother/cakephp,tenkoma/cakephp,cakephp-fr/cakephp,et304383/passbolt_api,petteyg/cakephp,petteyg/cakephp,jerems02/cakephp,CVO-Technologies/cakephp,jeffblack360/cakephp,garethellis36/cakephp,dakota/cakephp,cakephp-fr/cakephp,timhoeppner/cakephp,tenkoma/cakephp,et304383/passbolt_api,akintoey/cakephp,ionas/cakephp,bravo-kernel/cakephp,michaelze/cakephp,eboominathan/cakephp,tisu2tisu/cakephp,justinyost/cakephp,ADmad/cakephp,mvdriel/cakephp,web-player/cakephp,elboletaire/cakephp,et304383/passbolt_api,thinkingmedia/cakephp