Update php/variant-fpm.md

[TimWolla]

Some opinionated suggestions.

Fixes #2558

[tianon]

Seems fine, although I'd rather use plain apostrophes than fancy ones for these docs 👍

[tianon]

(I do wish more of the content from https://php-fpm.org/ moved to the PHP docs since it's interesting/useful background, but it's totally fair to make users find it instead of linking to it directly)

[tianon]

Nice, thank you!

[TimWolla]

although I'd rather use plain apostrophes than fancy ones for these docs 👍

Sure. Just a habit, because they are just too conveniently available on my Linux keyboard layer 3 😁

[TimWolla]

(I do wish more of the content from https://php-fpm.org/ moved to the PHP docs since it's interesting/useful background, but it's totally fair to make users find it instead of linking to it directly)

I just looked through that and didn't see anything particularly interesting. Anything you are specifically interested in? Given there is php/php-src#18217, perhaps add a short comment of what you would like to see moved to the official docs.

[tianon]

I meant more of the superfluous overview stuff, like that bulleted list right on the homepage. It's all very arguably "useless" information now that FPM is merged upstream (because it's information that probably helped convince folks it should go upstream, as opposed to meaningful information for people choosing/running it now).