improve notes for borrower import

Signed-off-by: Chris Cormack <crc@liblime.com>
Signed-off-by: Joshua Ferraro <jmf@liblime.com>

koha-tmpl/intranet-tmpl/prog/en/modules/tools/import_borrowers.tmpl

@@ -70,7 +70,7 @@
     'password',      'sort1',        'sort2'
 </li>
 <li>Please make sure the 'branchcode' and 'categorycode' are valid entries in your database</li>
-<li>password should be stored as a md5 hash</li>
+<li>password should be stored in plaintext, and will be converted to a md5 hash(if your passwords are already crypted, talk to your systems administrator about options)</li>
 </ul>
 </div>