Log Message:
Update to 1.633:

Changes in DBI 1.633 - 11th Jan 2015

    Fixed selectrow_*ref to return undef on error in list context
        instead if an empty list.
    Changed t/42prof_data.t more informative
    Changed $sth->{TYPE} to be NUMERIC in DBD::File drivers as per the
        DBI docs. Note TYPE_NAME is now also available. [H.Merijn Brand]
    Fixed compilation error on bleadperl due DEFSV no longer being an lvalue
        [Dagfinn Ilmari Mannsåker]

    Added docs for escaping placeholders using a backslash.
    Added docs for get_info(9000) indicating ability to escape placeholders.
    Added multi_ prefix for DBD::Multi (Dan Wright) and ad2_ prefix for
        DBD::AnyData2