quic: part 2... ngtcp2 and nghttp3

[jasnell]

This is the second of three separate PRs that would need to be landed together. They have been split to allow easier reviewing. This PR covers the addition of the ngtcp2 and nghttp3 dependencies to the source tree.

NOTE: This PR merges into the initial-quic-part-1 branch

The other two PRs in this batch are:

• openssl modifications: quic: part 1... quic-modified openssl #32377
• quic implementation: quic: part 3... initial quic implementation #32379

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• commit message follows commit guidelines

[sam-github]

This commit has two .gyp files in it, which are unique to Node.js (and have inconsistent indentation, if that matters).

For maintainability, the commit adding the gyp files that we maintain should be split from the commit adding the upstream maintained source.

The commit adding the upstream src should describe where it came from, and what version of the dep got vendored in (probably just a "curled from this URL (that includes a version), untarred, moved into place" is sufficient if it came from a released tarball.

There should be commit adding a doc/guide/maintaining-ngXXX doc (one? two? as you think reasonable) that describes how to update these deps when they inevitably need updating.

[jasnell]

Will work those changes in @sam-github thank you :-)

[jasnell]

Updated to include maintenance instructions

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/30290/

[jasnell]

Putting all three of the PRs here on the tsc-agenda to queue up discussion on how we want to get these landed.

[jasnell]

nodejs/quic master was rebased and sync'd with nodejs/master earlier today. The commits in the PR have been updated accordingly.