Commit ed3bc614cccec6167c64ac58d78344b6426cd019 got the logic wrong while
    trying to implement the logic we had in init_child_connection(),
    which was removed by commit d61f3626b79e0523beadff355453145aa7b0195c.
    
    Instead of doing a WINBINDD_GETDCNAME request (which would caused an error
    because the implementation was removed in commit
    958fdaf5c3ba17969a5110e6b2b08babb9096d7e), we sent the callers request
    and interpreted the result as WINBINDD_GETDCNAME response, which
    led to an empty dcname variable. As result the domain child
    opened a connection to the primary domain in order to lookup
    a dc.
    
    If we want to connect the primary domain from the parent via
    a domain child of the primary domain.