Further fix to issue 574\685 after change to daylight savings time.

There appear to be some additional problems with the impact of daylight savings time kicking in. Calculations of BIAS, Standard BIAS & Daylight BIAS are wrong when compared to values dispatched from mstsc.

This is showing up with Outlook 2010 meeting appointments, for example select America\Vancouver, appointments, once accepted get assigned an hour early.

I have also applied a fix to correctly send the Timezone information currently commented out of code referencing this issue number in libfreerdp_locale/timezone.c function freerdp_time_zone_detect()