Add support for /rw/config/rc.local-early to run commands as early as possible

[chriswoope]

This allows to run arbitrary commands early in initialization, which is useful for things like replacing Qubes GUI packages in a specific VM.

[marmarek]

@tasket will that interfere with https://github.com/tasket/Qubes-VM-hardening ? On the first sight, it shouldn't but I'd like to double check.

[3hhh]

This allows to run arbitrary commands early in initialization, which is useful for things like replacing Qubes GUI packages in a specific VM.

Just use systemd for that?

[marmarek]

Just use systemd for that?

You don't have (early enough) place to register systemd units stored in /rw. This addition could be such place.

[ben-grande]

If this is ever accepted, please remember to add drop-in configuration directory /rw/config/rc.local-early.d to follow packaging standards of allowing multiple configurations.

[FijiHasGithub]

Any news on this? Would be really helpful with a problem I am currently having