A variety of changes that add up to making outlook synchronization work
with PostgreSQL (at all) and Oracle (better).
1. Changed calendar to read SystemTimezone rather than hardwire it to
US/Eastern.
2. Made calendar depend on acs-lang since that's where the param lives.
3. Fixed the query on the acs-lang page that lets you set the timezone
(used the Oracle-ism UNIQUE rather than the standard DISTINCT)
4. Saw that the test stuff doesn't work and got rid of the links on the
index page - people can live without testing it for this release (we
should fix it for 4.7)
5. Fixed timezone__local_to_utc so it works with calendar, though it's
very whacky (shifted so the timezone'd date part is the UTC date, would
be much much better to use timestamp without timezone but PG doesn't
accept that syntax for function returns and we're not ready to drop
PG 7.2 support yet so I can't take advantage of the timestamp/timestamptz
type names, sigh)
