a localized string from the os for toLocaleString. The time struct
used to interface to the os time-formatting functions only takes a
16-bit year, so we map to an equivalent year (for getting the timezone
string) or clamp for years outside that range.
git-svn-id: svn://10.0.0.236/trunk@886 18797224-902f-48f8-a5cc-f745e15eee43