Windows timezone fact uses strftime instead of wcsftime.

When Windows is configured to use a timezone that has a localized name, like Mitteleuropäische Sommerzeit, Facter reports the timezone as Mitteleurop‰ische Sommerzeit in its output.

When the facts are sent to a Puppet master, the master reports an invalid UTF-8 sequence for the string.

I believe this is a result of using strftime instead of the correct wcsftime and then converting the result into UTF-8. Also, the return value of wcsftime should be used to size the string.