Deprecate the "mount -f" option for Linux 3.13 and later kernels
containing commit eee5cc2702929fd41cce28058dc6d6717f723f87, which
removed the super_block.s_files list_head member and the open files
list that it contained.  Without the patch, the command option fails
with the error message "mount: invalid structure member offset:
super_block_s_files"
(anderson@redhat.com)