Only the MySQL command is addressed in this patch, because the code
level approach is not safisfying me completely. It might be easier to
just bite the bullet and review all the optional clauses return values
rather than add a layer as this patch does.
The feature still is available for MySQL given this patch, so let's push
it, get feedback, then see about how to make the approach scale and
revise all the other commands.
The parser was happily parsing such a connection string as the
following, but the rest of the code didn't really know what to do about
it:
mysql://unix:/var/run/mysqld/mysqld.sock:/main
In passing, fix bugs where the PostgreSQL unix domain socket connection
was still shy of a brick load, omitting to consider the case where the
connection host is actually a list of '(:unix . "path/to/socket").
This rule has overridden the default rule for `tinyint(1)` and instead of placing `boolean`, it kept the typemod and placed `boolean(1)` into the resulting query.
