Add dawg endpoint to report a profile's config

We look at this a log when debugging a profile or synclet. Now you don't have to
connect to the database to do it.
Make `profileManager.reset` actually reset config

`configSet` merges the incoming set into the existing config. We have to
actually write an empty object to get what we want.
Add /profiles/resetConfig to dawg

`POST` to this endpoint with a `pid` and the config will get wiped out. We
return you what the DB has for `config` so you can see that it happened.
Merge pull request #801 from Singly/dawg-config-endpoints

Make config reset work and add Dawg endpoints