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            Move-construct a basic_socket_acceptor from an
            acceptor of another protocol type.
          
template< typename Protocol1, typename SocketAcceptorService1> basic_socket_acceptor( basic_socket_acceptor< Protocol1, SocketAcceptorService1 > && other, typename enable_if< is_convertible< Protocol1, Protocol >::value >::type * = 0);
This constructor moves an acceptor from one object to another.
                  The other basic_socket_acceptor
                  object from which the move will occur.
                
            Following the move, the moved-from object is in the same state as if
            constructed using the basic_socket(io_service&) constructor.