SCM20260N boot0

I am completing a design with the SCM20260N and I have boot0 on my part from an earlier document from the GHI website.

On the latest pinouts page, pin 44 is marked as reserved but on the Fez Portal pin 44 it is marked as boot0 but it doesn’t go anywhere as far as I can see. There is also no reference made to boot0 and its use.

What is the correct use of this pin, if any?

Or is reserved boot pin. Do not connect.