[fpc-pascal] Support for "class threadvar" sections inside class and record types

[Ryan Joseph]

> On Jun 23, 2018, at 9:45 PM, Sven Barth via fpc-pascal <fpc-pascal at lists.freepascal.org> wrote:
> 
> See also here: https://www.freepascal.org/docs-html/ref/refse26.html

I had no idea this existed. When was it added?

Regards,
	Ryan Joseph