fix: some broken IETF links

[saibotsivad]

From #2796 some IETF links were correct in the markdown syntax, but the generated HTML had broken links.

For example, the markdown for the Request Body Object > Fixed Fields (4.8.13.1) looks like this:

The key is a media type or [media type range](https://tools.ietf.org/html/rfc7231#appendix-D) and

But the rendered HTML looks like this:

The key is a media type or [media type range]appendix-D) and

The problem occurs due to the markdown pre-processor code used to adjust RFC links.

It looks like the original intent of lines 267-269 was to transform links that looked like this:

[RFC2119](https://tools.ietf.org/html/rfc2119)

Into this format:

[[!RFC2119]]

I'm not sure what the reasoning was for that, but if I simply delete lines 267-269, it does resolve the issue.

To be thorough, I inspected the output for instances of lines containing https://tools.ietf.org/html/rfc at the end, aka what lines 267-269 would have operated on, and it's all links where the text is not RFC\d+. Specifically:

• In versions 3.0.0-3.1.0 the "Media Type Object" has two instances of <a href="https://tools.ietf.org/html/rfc7231#appendix-D">media type range</a>
• In versions 3.0.0-3.1.0 the "Runtime Expressions" section has <a href="https://tools.ietf.org/html/rfc5234">ABNF</a>
• In version 3.0.0 only, in the "Operation Object" section under "Fixed Fields", the requestBodies section has one for each method, e.g. <a href="https://tools.ietf.org/html/rfc7231#section-4.3.1">GET</a>

Since that's the only instances affected by removing lines 267-269, this change seems very safe.

[saibotsivad]

@webron any progress on this? Just wanting to make sure it didn't fall through the cracks. 😅

[webron]

Thanks, @saibotsivad. It looks pretty straight forward but would like someone else from the TSC to look into it before the merging. I added it to this week's meeting agenda. I can't attend to it this week, but hopefully they'll be able to review it. If you can join the meeting, it could help with the review process but not required.

[saibotsivad]

Neat! I'll see if I can make it to the meeting. 👍