Fix for very corner case issue with date element, in render(), need to
strip db quotes off of supplied date.  Like when doing CSV export after
doing an advanced search on a date.
Added $appendEmpty arg to _appendQS() method in redirect plugin.  Not
yet using it, just need it for testing a new option not to append empty
element data with "append form data to jump url" option, as this causes
issues when using things like checkboxes in a search form, when no
checkbox selected.