Uncomment licenses/terms flags

[alexfmpe]

Unclear why two steps are required for a single opt-in.

It has happened on multiple projects that I uncomment the flag but forget to also toggle it.

An alternative is leaving as a comment with = true but the approach here has the advantage that changes upstream to the attribute paths will trigger eval errors/warnings when they happen, not when the flag is next uncommented, minimizing distance between cause and effect.

I have:

• Based work on latest develop branch
• Followed the contribution guide
• Looked for lint in my changes with hlint . (lint found code you did not write can be left alone)
• Run the test suite: $(nix-build -A selftest --no-out-link)
• Updated the changelog
• (Optional) Run CI tests locally: nix-build release.nix -A build.x86_64-linux --no-out-link (or x86_64-darwin on macOS)