v3.1.x: oob/ud: remove double free #5675
                
     Merged
            
            
          
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And just for the hecuvit, add in a clarifing comment and a unique
return code that more precisely defines the error that occurred.
Signed-off-by: Jeff Squyres [email protected]
(cherry picked from commit edac2cb)
Note that this is not a cherry pick from master because oob/ud has already been removed from master. It was originally committed in v2.1 (see #5673) and cherry picked to this branch.
DO NOT MERGE BEFORE #5673.
Refs #5672