Database management page

[Caiyeon]

With the database plugin system, one backend can handle multiple connections, and the mapping of allowed roles to connections can get a little spaghetti. A dozen databases with a couple of dozen roles can seem very cryptic, even with vault's API.

It would be nice to have a page that is able to fetch this information and display it in an intuitive fashion.

A couple of problems that would have be considered are:

How to handle multiple database backends

How to fetch this data at scale. Loading every connection config upon visiting the page would be overkill, if it can be avoided.