Log Message:
Update to 6.43. From the changelog:

    Several changes to distribution files
        I made several changes to Build.PL, Makefile.PL, META.yml in order
        to improve the quality (or kwalitee) of the module. None of these
        should impact anyone using the module.

    Time zone fixes
        Newest zoneinfo data (tzdata 2013i)

        Newest zoneinfo data (tzdata 2013h)

    Documentation fixes
        Cleaned up some of the Recur documentation. Suggested by RT 92794

    Added ParseDateFormat function
        Added the ParseDateFormat function to the DM6 functional interface
        in response to RT 89286.

    Added Common Log format
        Added the date format used in apache logs: 11/Oct/2000:13:55:36
        -0700 RT 89286.

    Bug fixes
        Fixed a bug where dates of the form of a delta with a timezone
        attached (i.e. "1 day ago at midnight UTC") failed. RT 89256

        Fixed a bug where events handling gave a warning if there were no
        events that applied. RT 90344