Deciphering a Porter's Handbook paragraph

[Warren Block]

Existing:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/porting-prefix.html

Proposed:
http://www.wonkity.com/~wblock/porters-prefix/book.html#PORTING-PREFIX
diff: 
http://www.wonkity.com/~wblock/porters-prefix/patch-porters-prefix.diff

I'll start a new thread on the ports mailing list for feedback, too.

Thanks!