time op inconsistent on Win32

[Jonathan Worthington]

Hi,

I've just been looking at the time op, and what it returns is somewhat 
platform specific.

* On Win32, it's the number of seconds since January 1, 1601

* In other codepaths, it appears to be the number of seconds since 
January 1, 1970.

I'm thinking we should correct the Win32 version to do the same as the 
others for consistency? Or should we keep these platform specific and 
make code that cares check what OS we are on and work it out (don't like 
this option so much, since we're meant to be abstracting the OS away...)

Opinions?

Thanks,

Jonathan