[fpc-pascal] SysLocale usage

[Marco van de Voort]

In our previous episode, Tomas Hajny said:
> > The necessary code is currently still missing from clocale on unix.
> 
> Are the respective identifiers used on Windows platform independent?

Looks totally windows specific to me. Probably that is the reason why
clocale doesn't since you'd need large "iso-code" to Lcid tables that
unnecessarily increase binary size.