[FEAT] drop NET_ADMIN capabilities or add reasoning to documentation

[mhymny]

Is this a new feature request?

• I have searched the existing issues

Wanted change

I want to either remove the NET_ADMIN capability or document why it is needed.

Reason for change

I am able to run the docker image using podman without the NET_ADMIN capability, so I don't see a reason for the container to have those capabilities. I have been only using sunshine and moonlight, so this might be a steam remote play issue which I cant test right now. In any case however this seems to be the only undocumented parameter.

Proposed code change

No response

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[LinuxServer-CI]

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[thelamer]

NET_ADMIN is needed for steam remote play specifically spoofing the IP if setting the host, I found that was needed when using a Linux host and a Windows client.

As far as requirements the only hard requirements are apparmor and seccomp unconfined as steam will not run without it, the rest is optional.