adding a resource in use check to prevent umounting chroot jail when in use by a process other than apache
adding a resource in use check to prevent umounting chroot jail when in use by a process other than apache

UMD-SEAM/bugbox,UMD-SEAM/bugbox,UMD-SEAM/bugbox,UMD-SEAM/bugbox,UMD-SEAM/bugbox,UMD-SEAM/bugbox,UMD-SEAM/bugbox