Added support of article storage filesystem cache.
Added support of article storage filesystem cache.

rudy500/otrs,thorsteneckel/otrs,rudy500/otrs,s7design/otrs,xhoy/otrs,crythias/otrs,brandonshults01/otrs,MBRG/otrs,MBRG/otrs,nilei/otrs,xhoy/otrs,s7design/otrs,xhoy/otrs,nilei/otrs,brandonshults01/otrs,crythias/otrs,MBRG/otrs,xhoy/otrs,eliasp/otrs,MBRG/otrs,linearregression/otrs,crythias/otrs,muehlbauer/otrs,rudy500/otrs,brandonshults01/otrs,s7design/otrs,nilei/otrs,brandonshults01/otrs,nilei/otrs,MBRG/otrs,linearregression/otrs,s7design/otrs,muehlbauer/otrs,eliasp/otrs,mburggraf/otrs,eliasp/otrs,eliasp/otrs,xhoy/otrs,eliasp/otrs,thorsteneckel/otrs,brandonshults01/otrs,rudy500/otrs,muehlbauer/otrs,muehlbauer/otrs,s7design/otrs,mburggraf/otrs,thorsteneckel/otrs,linearregression/otrs,nilei/otrs,linearregression/otrs,crythias/otrs,thorsteneckel/otrs,mburggraf/otrs,muehlbauer/otrs,crythias/otrs,rudy500/otrs,linearregression/otrs,mburggraf/otrs,thorsteneckel/otrs,mburggraf/otrs