(gss_name_t, read) Internal name to be duplicated.
gss_name_t * dest_name
(gss_name_t, modify) The resultant copy of src_name.
Storage associated with this name must be freed by the application
after use with a call to gss_release_name().
Create an exact duplicate of the existing internal name src_name.
The new dest_name will be independent of src_name (i.e. src_name
and dest_name must both be released, and the release of one shall
not affect the validity of the other).
`GSS_S_COMPLETE`: Successful completion.
`GSS_S_BAD_NAME`: The src_name parameter was ill-formed.