Rename RDP_INFO flags to spec names

[gpotter2]

This is a part of #3776

[matt335672]

I'm all for doing this - I've done a few myself, but is there a reason why we're not using the actual spec names here (i.e. without the RDP_ prefix)?

The only reason I can think of not to use spec names is if it would cause a conflict in xrdp-neutrinordp.c. I've just run a quick compile check and this isn't the case.

I'm happy to be argued out of this position.

[gpotter2]

I don't have an opinion. Do you want me to change it?

[matt335672]

I think so. If we get a clash later we can fix it then. I think sticking as close to the spec as we can is a good thing to at least try to achieve.

[gpotter2]

Fine by me, done ! In this case I also took the liberty to split the "normal". I think I kept the RDP_ initially because I couldn't figure how to rename the "normal"

[metalefty]

LGTM

[metalefty]

Oops.

[gpotter2]

Thanks ! this PR only exists to make #3776 possible, feel free to take a look 😊