enhancement: Move legal notice to an appropriate location

[mjang]

Proposed changes

From issue #625

'I wonder if we can tuck the legal blurb at the bottom of this doc somewhere else -- it's a bit awkward to lead with it.

Right now it reads like:
“Here are the great things you can do with NGINX One. But first, a word from the lawyers.”'

Solution: Moved content to the bottom of the glossary

Closes #625

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Footnotes

1. Potentially sensitive changes include anything involving code, personally identify information (PII), live URLs or significant amounts of new or revised documentation. Please refer to our style guide for guidance about placeholder content. ↩

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