the doc about configuring trusted proxies in Symfony 5.2+ is wrong

[stof]

the doc at https://symfony.com/doc/current/deployment/proxies.html#solution-settrustedproxies shows example using negated values and examples using class constants of Request in the semantic config of FrameworkBundle.
This was indeed supported in the initial implementation of the feature, but it was removed before the 5.2.0 release when deprecating the HEADER_X_FORWARDED_ALL constant in the component, to keep only the additive way.

[javiereguiluz]

I don't know how to update that ... so please, someone submit a PR or tell me the exact changes to do. Thanks!

[xabbuh]

see #14964