connect_client thread will work more than just first-time.


ndb/src/common/transporter/Transporter.cpp:
  m_r_port is now m_s_port a SIGNED port. <0 is dynamic
ndb/src/common/transporter/Transporter.hpp:
  m_r_port is now m_s_port, a SIGNED port number (<0 is dynamic).
  
  We give the socket client a positive port though.
ndb/src/common/transporter/TransporterRegistry.cpp:
  Transporter now holds SIGNED port number (<0 dynamic)