Log Message:
Update to 1.23

Upstream changes:
1.23	- 2016-03-25, H.Merijn Brand
    * Skip unsupported encodings
    * Reorganize Unicode section and mention layers (Dan Book)
    * Amend some UTF-8 tests for PERL_UNICODE settings
    * Fix crash on error in parsing with bound columns (RT#113279)
    * Add predefined filters (not_blank, not_empty, filled)