This turned out to be a fairly bad idea. It begun as a way to try
and mirror what happens in the postgresql module for consistency
but instead made things complex.
I've changed it to have the override_options in mysql::server which
leads much more naturally out of the design and shape of MySQL.
This initial round of work focuses on adding the concept of
mysql::globals to the module. This is a shared place to provide all the
data the module needs, and then clients, servers, and providers can all
rely on this information to set things up.
This is being primarily used at first to allow a default_options hash
that contains all the previous parameters and takes a overrides_options
that allows you to then further customize any of the options in my.cnf.
