Documentation errors

[jszuppe]

• In documentation on boost.org links to APIs of core classes are not there, however, everything is fine here on GitHub.
• snippets do not work (for example see this and this).

[keryell]

Yes and I wonder if it is not related to #621

[keryell]

Is this considered as solved ?

[jszuppe]

No, I think nobody checked if PR #766 works.

[ameyanator]

Is this issue still open?

[keryell]

Is there anyone with Boost build infrastructure set up to try, please?