DATETIME + TIMEZONE

Our existing timezone system is messed up beyond my ability to repair it. This is what is proposed for the tarball release:

a) Only support UTC (for both storage and display of datetime values)

b) Remove all the code in mysys/my_time.cc and drizzled/tztime.cc which references timezones. It's irrevocably borked.

FYI, if you thought it was "working" up until now, you'd be mistaken. The test-run.pl script does not set the database server's timezone (using set @@time_zone="GMT-3"). It overrides the machine's TZ environment variable, and upon startup, the init_time() routine attempts to determine an offset from GMT based on the TZ environment variable. This routine sets a few global variables (namely my_time_zone) to a long value offset from GMT in seconds. The rest of the routines in tztime.cc and my_time.cc reference this offset and attempt to correct it based on daylight savings. The system is just totally borked IMHO.

If we can agree to a) and b) above, I think I can finish up the temporal work this weekend.

After tarballs are done, I can complete my existing work on using the ICU library's timezone handling as our base timezone stuff and add back the ability to have timezones handled by the server.