Warning due to mismatched timezone db versions is inaccurate

[autarch]

Migrated from rt.cpan.org #66097 (status was 'new')

Requestors:

• ether@cpan.org (@karenetheridge)

From ether@cpan.org (@karenetheridge) on 2011-02-23 23:35:47:

I just updated DateTime::TimeZone today (to 1.28); there was a process
already running in the background that uses DateTime::TimeZone, and this
warning appeared in my logs:

Loaded DateTime::TimeZone::Europe::Rome, which is from an older version
(2011b) of the Olson database than this installation of
DateTime::TimeZone (2010j).

No doubt this is because using the timezone object checks the db on
disk, which was updated to a newer version than the version of the TZ
module running in memory -- so I'm not worried about the fact that I got
this warning. However, the message is inaccurate - it says "older" when
in fact this version is newer. The code reveals:

    if ( $object_version ne $catalog_version ) {
        warn
            "Loaded $real_class, which is from an older version

($object_version) of the Olson database than this installation of
DateTime::TimeZone ($catalog_version).\n";
}

This is an equality check, rather than a gt/lt comparison. I would
suggest either altering the error message to say "from a different
version", or not warning at all if the db is newer than the code (I'm
not sure if it is useful to warn in this case or not).