Updates to the CI doc

Doc was prepared while many things were in flight, that have since
landed. Update links to those things.

Several of the links to footnotes were broken (no leading space ->
rst2html doesn't notice it's a footnote reference) so I tweaked those as
well.

Change-Id: I4d7ed4c0ed568934542e9cc2141d81ef48a6ac40
Merge "Updates to the CI doc"