This fixes the problem in 5.0 in the correct way.

The previous patch (for 4.1) is only valid for 4.1 and is done at the right time
for 4.1.


ndb/src/kernel/main.cpp:
  The ndbd angel process keeps the mgm connection open as it retains a reference
  to the socket.
  
  this means that when the mgm server is killed, the socket stays in CLOSE_WAIT 
  (the ndb process will close() it okay in 5.0, as we reused it for a transporter
  but this isn't enough as the angel process still has a reference to that socket).
  
  so, by adding in a theConfig->closeConfiguration(); in the angel process, the ndb
  process is left with the only reference to the socket - which it can close whenever
  it likes (namely when the connection is terminated).