Bug 6328 follow-up for QA comments

Bug 6328 follow-up for QA comments

* fixed documentation in C4/Auth_with_ldap.pm
* updated ILSDI/Utility.pm to work with debarred being a date
* updated Members.pm/patronflags to work with debarred being a date (copy/paste of BibLibre code that had not been backported)
* fixed opac-reserve to check correctly for debarred status

I also have removed a duplicate line on circulation.pl when the patron was restricted = the information was displayed twice