(bug #4853) change rights needed to renew loans

Use "circulate" right, instead of "borrower".

reserve/renewscript.pl

@@ -38,8 +38,8 @@ my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
         query           => $input,
         type            => "intranet",
         authnotrequired => 0,
-        flagsrequired   => { borrowers => 1 },
-        debug           => 1,
+        flagsrequired   => { circulate => 1 },
+        debug           => 0,
     }
 );