Fix links to CSP list initialization algorithms

[foolip]

The spec as a whole is written in en-GB-x-hixie, but this is the name of
an algorithm, similar to InitializeHostDefinedRealm, so do not use
data-x="..." to change the spelling in the prose.

The "Initialize a global object's CSP list" algorithm is actually
unused.

Part of #573

[foolip]

@mikewest, can you PTAL? Is it a bug that "Initialize a global object's CSP list" is not used by HTML?

[foolip]

@Hixie, I see that you have added lang="en-US" in a few places that use US spelling, like "DOM Parsing and Serialization". Is that part of some tooling you have for checking that the document consistently uses Hixie-English, or just because it's true?

[mikewest]

Hrm. Initialize a global object's CSP list should be used when running a worker. I think we need to replace step ~16 of "Run a worker" (https://html.spec.whatwg.org/#run-a-worker) with something like "Execute the Initialize a global object's CSP list on |worker global scope| and |response|."

Would you like to do that in this patch, or shall I put something together separately?

[foolip]

I'd like to limit this patch to fixing link issues, so please go ahead and do that separately, sounds like you know exactly what's needed.

[foolip]

Gave you an issue so that I can reference it in my commit message.

[sideshowbarker]

LGTM. (Sorry for delay, was away for most of the evening til now…)