Bug 6756: Add info messages

Bug 6756: Add info messages

NOTE: Before patch "./misc/cronjobs/batch_anonymise.pl --help" had no
      message, and neither did the anonymizing tool in the staff client.
      After the patch, both had informative messages.

Signed-off-by: Mark Tompsett <mtompset@hotmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
(cherry picked from commit 1acddd0f1b41e9e5f75b75d9d101c8b0879c00c5)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>