Fix problems with the docs for the remap.config ConfigFile Parameters

[ocket8888]

What does this PR (Pull Request) do?

• This PR is not related to any Issue

This includes problems that inhibit rendering as well as consistency and semantic issues, including:

• sample inputs incorrectly labled as files
• broken term linking
• missing term linking
• multiple intended table rows rendering as a single row
• reword some things for clarity
• an intended list of plugin pparams that was actually written as a list of terms and definitions
• using spaces instead of indentation
• incorrect admonition class
• expanding unmarked abbreviations
• extraneous spacing at the beginning of sentences
• URLs as citations instead of links
• list in a blockquote when it isn't quoting anything

... and it shortens an underline in the Delivery Services overview, which is technically unrelated, I just saw it when I was looking for a label.

The build output no warnings, but a look at the rendered output shows that the author's intent was not properly translated into the markup.

Which Traffic Control components are affected by this PR?

• Documentation

What is the best way to verify this PR?

Make sure there are no docs build errors or warnings, and verify that the output is properly rendered into HTML, visually, structurally, and semantically.

The following criteria are ALL met by this PR

• Tests are unnecessary
• This PR includes documentation
• An update to CHANGELOG.md is not necessary
• This PR includes any and all required license headers
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY