Support max_user_connections in database_user

[mbakke]

Here's code to support max_user_connections on the account level.

This is my first venture into rspec, so I can't promise that the tests are any good.

Unfortunately it cannot be added during user creation without changing CREATE USER to a GRANT statement. I can do this if desirable.

[apenney]

I think I'd be interested in hearing about the switch to a GRANT for creating the user. (Or even seeing an example of what that would look like). I would love it if this worked as part of the initial create so changing whatever you would need to sounds good to me assuming it would give the same result if they weren't setting max_user_connections at all.

[mbakke]

I've changed user creation to a GRANT that always passes max_user_connections (0 if not part of the resource).

Note that this will require a password hash if the NO_AUTO_CREATE_USER SQL mode is activated. I assume the ones running that mode already knows this, but perhaps it should be documented.

http://dev.mysql.com/doc/refman/5.6/en/grant.html

[apenney]

I think this looks great! Thank you for putting in the time and effort on this. :)