Whenever an Evergreen build of libbson or libmongoc finishes building the HTML docs, it should upload them to S3 so we can see them rendered. A waterfall build might overwrite well-known locations like

• https://s3.amazonaws.com/mciuploads/libbson/docs/latest/index.html
• https://s3.amazonaws.com/mciuploads/mongo-c-driver/docs/latest/index.html

... so that we can always see the latest unreleased docs rendered. Patch builds can upload them to temporary locations in S3 so we can review each other's changes to the docs.

If we get this to work, tell other driver teams about it.