add method to OC_Cache to check whether a fast cache (apc/xdebug/etc) is available
add method to OC_Cache to check whether a fast cache (apc/xdebug/etc) is available

sharidas/core,owncloud/core,whitekiba/server,pixelipo/server,pixelipo/server,pmattern/server,Ardinis/server,pollopolea/core,cernbox/core,pmattern/server,owncloud/core,lrytz/core,nextcloud/server,pmattern/server,andreas-p/nextcloud-server,lrytz/core,jbicha/server,bluelml/core,endsguy/server,pollopolea/core,whitekiba/server,lrytz/core,Ardinis/server,IljaN/core,sharidas/core,cernbox/core,michaelletzgus/nextcloud-server,sharidas/core,Ardinis/server,andreas-p/nextcloud-server,bluelml/core,xx621998xx/server,owncloud/core,jbicha/server,bluelml/core,andreas-p/nextcloud-server,IljaN/core,andreas-p/nextcloud-server,cernbox/core,pixelipo/server,bluelml/core,nextcloud/server,whitekiba/server,pmattern/server,andreas-p/nextcloud-server,pixelipo/server,xx621998xx/server,xx621998xx/server,endsguy/server,nextcloud/server,Ardinis/server,xx621998xx/server,owncloud/core,owncloud/core,endsguy/server,bluelml/core,michaelletzgus/nextcloud-server,lrytz/core,michaelletzgus/nextcloud-server,Ardinis/server,pollopolea/core,whitekiba/server,IljaN/core,endsguy/server,IljaN/core,jbicha/server,nextcloud/server,IljaN/core,pmattern/server,michaelletzgus/nextcloud-server,pollopolea/core,xx621998xx/server,jbicha/server,pixelipo/server,cernbox/core,cernbox/core,sharidas/core,whitekiba/server,sharidas/core,phil-davis/core,endsguy/server,pollopolea/core,lrytz/core,jbicha/server