[nginx] Document modules as a way to patch nginx?

[Valery Kholodkov]

Considering the definition of the term "hack" as well as the factual 
side that you just have stated, this renders Nginx modularity 
essentially dysfunctional from professional programming point of view.

On 18-11-19 17:39, Maxim Dounin wrote:

> Note well that many things can be implemented as modules only by
> introducing various hacks, such as re-implementing nginx internal
> functions.  While this approach may appear to work, such a module
> will experience various unexpected problems on changes in nginx
> internals, and hence this is not recommended.

-- 
Val