Remove Page macro from glossary

[hamishwillee]

As per #3196 we are removing the Page macro (transclusion).

This removes the two usages from the Glossary. In both cases transclusion was used to expand an acronym or close variant of a term (e.g. Denial of Service and DoS Attack). What I did was replace the page call with the first sentence of the transcluded article and a "See XXX for more information".

I also chose to swap the content from Second Level Domain and SDL topics - IMO the master document is the one that is most commonly used, and/or least ambiguous. So in this case I see SDL as ambiguous.

[github-actions]

Preview URLs

• https://pr4687.content.dev.mdn.mozit.cloud/en-US/docs/Glossary/Denial_of_Service
• https://pr4687.content.dev.mdn.mozit.cloud/en-US/docs/Glossary/Second-level_Domain
• https://pr4687.content.dev.mdn.mozit.cloud/en-US/docs/Glossary/SLD

Flaws

None! 🎉

External URLs

URL: /en-US/docs/Glossary/Denial_of_Service
Title: Denial of Service
on GitHub

No external URLs

URL: /en-US/docs/Glossary/Second-level_Domain
Title: Second-level Domain
on GitHub

No external URLs

URL: /en-US/docs/Glossary/SLD
Title: SLD
on GitHub

No external URLs

[chrisdavidmills]

LGTM; thanks @hamishwillee !