g:createLink resource="" should allow specifying contollerName

[codeconsole]

Given the following:

class Sample {
    String name
}

class Sample2Controller {
    static scaffold = Sample
}

all the links should work, but they don't. They all end up pointing to /sample/$action

this is due to the resource option in links. This could be fixed by also allowing to override resource with controllerName, but does not perform as expected..