fixed serious memory leaks of DM2_REQUEST stubs
fixed serious memory leaks of DM2_REQUEST stubs

* Objects were passed into dm_enqueue(), apparently with the intention
  that it takes ownership of the object.
  dm_enqueue() only reparented DM2_REQUEST::packet though.
* Effectively, we leaked a few bytes for every dmconfig request sent.

metratec/mand,metratec/mand,metratec/mand