=head2 CanBookBeRenewed
-($ok,$error) = &CanBookBeRenewed($borrowernumber, $itemnumber);
+($ok,$error) = &CanBookBeRenewed($borrowernumber, $itemnumber[, $override_limit]);
Find out whether a borrowed item may be renewed.
C<$itemnumber> is the number of the item to renew.
+C<$override_limit>, if supplied with a true value, causes
+the limit on the number of times that the loan can be renewed
+(as controlled by the item type) to be ignored.
+
C<$CanBookBeRenewed> returns a true value iff the item may be renewed. The
item must currently be on loan to the specified borrower; renewals
must be allowed for the item's type; and the borrower must not have