Add Fractional seconds to DateTimeFormatter

[sampsont]

I need a fractional second option for the DateTimeFormatter. Currently, only millisecond is supported.

I propose adding the %F option shown below to the Poco library. Is this possible? Is there a better way?

Thanks!

[code]std::string DateTimeFormatter::format(const DateTime& dateTime, const std::string& fmt, int timeZoneDifferential)
{
case 'F': result.append(NumberFormatter::format0(dateTime.millisecond() * 1000 + dateTime.microsecond(), 6)); break;
}
/code]