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 1acddd0f1b)
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
(cherry picked from commit 715a7bf4f5)
Signed-off-by: Liz Rea <wizzyrea@gmail.com>

koha-tmpl/intranet-tmpl/prog/en/modules/tools/cleanborrowers.tt

@@ -1,3 +1,4 @@
+[% USE Koha %]
 [% USE KohaDates %]
 [% INCLUDE 'doc-head-open.inc' %]
 <title>Koha &rsaquo; Tools &rsaquo; Batch patron deletion/anonymization [% IF step == 2 %]&rsaquo; Confirm[% END %][% IF step == 3 %]&rsaquo; Finished[% END %]</title>
@@ -91,6 +92,9 @@
         </fieldset>
         <fieldset>
         <legend>Anonymize checkout history</legend>
+        [% UNLESS Koha.Preference('AnonymousPatron') %]
+            <div class="dialog message">The AnonymousPatron system preference is not defined. You can use this feature anyway but NULL will be used to update the checkout history.</div>
+        [% END %]
         <h3><input id="checkissue" type="checkbox" name="checkbox" value="issue" /><label for="checkissue"> Verify you want to anonymize patron checkout history</label></h3>
         <br />
         <ul>

misc/cronjobs/batch_anonymise.pl

@@ -45,6 +45,7 @@ Usage: $0  --days DAYS  [-h|--help]
    -v --verbose       gives a little more information
    -h --help          prints this help message, and exits, ignoring all
                       other options
+Note: If the system preference 'AnonymousPatron' is not defined, NULL will be used.
 USAGE
     exit $_[0];
 }