Documentation - Typos & Consistency Fixes

[joey-gm]

Some typo & consistency fixes for consideration.

Checklist

• I've run tests to see all new and existing tests pass
  6 RSA key tests failed, but they are unrelated to the changes in this commit.
• I've followed the code style of the rest of the project
• I've read the Contribution Guidelines
• I've updated the documentation if necessary

If you've made changes to gyb files

n.a.

Motivation:

Update documentation.

Modifications:

Only documentation has been updated. No code changes.

[Lukasa]

Thanks for this! We don't accept patches to the vendored copy of BoringSSL, can you remove those?

[joey-gm]

Thanks for this! We don't accept patches to the vendored copy of BoringSSL, can you remove those?

Reverted changes in BoringSSL and squashed the commits.

[Lukasa]

Thanks!

[Lukasa]

@swift-server-bot test this please