[sv-ac] default disable iff

Hi John,

To define the scoping rules for 1648 "default disable iff" I planned to
re-use most of the wording from 22.8 scoping rules(shown edited below).
This means that a default disable iff would not apply to nested modules.
Do we want them to apply to nested modules?  

		Default disable iff shall be declared either within a
the task, function, named block, or generate block locally or
		within a module, interface, program, task, function,
named block, or generate block that is higher in the
		same branch of the name tree that contains it. the task,
function, named block, or generate block. If it is
		declared locally, then the local item shall be used; if
not, the search shall continue upward until an item by
		that name is found or until a module, interface, or
program boundary is encountered.  
		More than one default  disable iff item within the same
scope is an error. 

Lisa


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