[$] Python time-zone handling

Handling time zones is a pretty messy affair overall, but language runtimes mayhave even bigger problems. As a recent discussion on the Python discussionforum shows, there are considerations beyond those that an operatingsystem or distribution needs to handle. Adding support for the IANA time zonedatabase to the Python standard library, which would allow using nameslike "America/Mazatlan" to designate time zones, is more complicated thanone might think-especially for a language trying to support multiple platforms.