[Crash-utility] cacheutils extension module update

[Kazuhito Hagio]

Hi Dave,

I've enhanced my cacheutils extension module, and now it has three commands
"ccat", "cls" and "cfind".

  https://github.com/k-hagio/crash-cacheutils

Could you please update the command help pages in your extensions page?


Main changes:

- Add a new "ccat -d" option that extracts a directory and its contents
  with one command:

    crash> ccat -d /var/log /tmp/log
    Extracting /var/log to /tmp/log...
    done.

- Add a new "cfind" command that can be used to search for files through
  a specific directory or the whole file system:

    crash> cfind / | grep messages
    ffff88010113be00 /var/log/messages
    ffff880449f86b40 /usr/lib/python2.7/site-packages/babel/messages

- Add a new "cfind -c" option that counts the number of directory entries
  in a directory and its subdirectories:

    crash> cfind -c /boot
      TOTAL DENTRY N_DENT PATH
         18     12      6 /boot
          8      6      2 /boot/grub2
         34     34      0 /boot/grub2/locale
        268    268      0 /boot/grub2/i386-pc
          1      1      0 /boot/grub2/fonts
          1      1      0 /boot/efi
          2      1      1 /boot/efi/EFI
          3      0      3 /boot/efi/EFI/redhat
        335    323     12 TOTAL

- Add a new "-n" option to each command to support mount namespaces.

Thanks,
Kazu