Feature: Implement hover-over referencing

[s-makin]

The problem

Now that we have a functioning glossary page, one cool feature that would be awesome to have is the Wikipedia-style functionality that pops up a definition of a term or acronym when you hover over a link to the glossary.

The task

This functionality is available through the hoverxref Sphinx extension, which needs to be installed and tested to make sure the behaviour is correct.

Suggested approach

• Install the Sphinx extension according to the hoverxref documentation linked above. This is done by specifying it in the custom_conf.py file. Note, this is sometimes trickier than it sounds!
• Test to make sure it works :D

A test definition ("ACL") was included in the initial glossary implementation, on the openldap/access-control page. As long as the pop-up appears in your local build of the documentation when you hover over the term, and the text matches the expected text defined under the definition, then it's working :)

[s-makin]

@activus-d Here's one of the follow-up issues to the initial glossary implementation. Please let me know if you still want it :)

[activus-d]

@activus-d Here's one of the follow-up issues to the initial glossary implementation. Please let me know if you still want it :)

Please go ahead and assign the issue to me.

[s-makin]

Please go ahead and assign the issue to me.

Thanks @activus-d - I've assigned it to you now, let me know if you need any more info :)