Omnibus lint pass for SPDX issues - most packages starting with 'O'

[heliocat]

Bunch of messy stuff this go-around so not at all comprehensive in the grand scheme of things.

General

• This is a new package and it conforms to the quality requirements

Have the results of the proposed changes been tested?

• I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
• I generally don't use the affected packages but briefly tested this PR

Does it build and run successfully?

(Please choose at least one native build and, if supported, at least one cross build. More are better.)

• I built this PR locally for my native architecture, (x86_64)
• I built this PR locally for these architectures (if supported. mark crossbuilds):
  • aarch64-musl
  • armv7l
  • armv6l-musl

[heliocat]

This is going to be broken until whoever manages the downloads.kde.org mirror list and stops routing traffic to a busted mirror.

[heliocat]

So, good news is that everything has successfully built on every platform at least once. The bad news is never at the same time.

[heliocat]

Kicking out oxygen-gtk+ into its own PR due to the repeat failures with building.

[heliocat]

This is good to merge, the dodgy package was split out and merged independently.

[github-actions]

Pull Requests become stale 90 days after last activity and are closed 14 days after that. If this pull request is still relevant bump it or assign it.