Confd handling of yang units parameter

Hi Les,

I think this one is answered in How do i use 'units'? which refers to the RFC:

7.3.3.  The "units" Statement

   The "units" statement, which is optional, takes as an argument a
   string that contains a textual definition of the units associated
   with the type.

Bottom line, it is pretty much just a comment and not used elsewhere.

Best,

Scott