Zero delta ?

[Eneko Gotzon]

Hi all Byte Masters.

Absolute beginner starting to learn about FreeBSD so excuse this kind of
question.

In the *Who Uses FreeBSD?* section of the Handbook it is written:

*Netflix has made extensive contributions to the codebase and works to
maintain a zero delta
<https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/nutshell.html>
from mainline FreeBSD*.


Please, what must I understand about that *zero delta* expression? Thank
you very much.

-- 
Eneko Gotzon Ares
enekogotzon at gmail.com