Add db.options to manifest

[mshick]

This adds the db options object to the manifest if it exists.

I was looking for a way to access these in my multilevel client and came across this ticket. juliangruber/multilevel#17

[juliangruber]

👍

[dominictarr]

this is probably a good idea, but can you describe the specific use case where you need this?

[mshick]

I'm working on a hapijs/catbox cache adapter using Multilevel, catbox-multilevel. For practical reasons I'm limiting the scope of the project to use utf8 keys, and json or utf8 vals (usage is very similar to redis). I attempted to put a non-JSON-parseable string into a datastore with json value encodings which caused an error on the Multilevel server (since it ignored the local opts).

In the interest of saving people headaches, I'd like to read in the server key and value encoding options, and either set the module's mode automatically, or trigger a warning for the user attempting to start the adapter with mismatched options.