What is oficial list of ARCHS for NOT_FOR_ARCHS / ONLY_FOR_ARCHS?

[Torsten Zuehlsdorff]

Hello Lev,

>    I'm confused, should I use "arm64" or "aarch64" and how to spell
>   mips(el?)(64?32?) properly.
>

That is a good question. I scanned through /usr/ports/Mk/bsd.ports.mk. 
ARCH is documented as:
"The architecture of the target machine, such as would be returned by 
"uname -p"."

I tried to find the related source-code, but stopped - currently i'm to 
short on time. But i hope this gives you a good pointer.

Greetings,
Torsten