Bug 584453 - Handle char ** correctly (and const variation)

Bug 584453 - Handle char ** correctly (and const variation)

This patch fixes our default handling of char **.  We add Return
node types as a case where we test for array handling.

Remove the hardcoded assumption of array = "no transfer", just
use the separate Parameter/Return cases.  This change causes
inout char ** to be transfer="full", but that seems more correct.