WL2278 Dynamic ports - Impl 6, "deal with mgm server restart and multiple mgm servers"

- when connecting to a mgm server as a transporter, create a NdbMgmHandle
  - over this mgm handle, report the dynamic ports
  - then turn it into a transporter
- this will re-report dynamic ports to mgmds when they restart (as we'll have to
set up our transporter again). This will also report it to all mgmds (as we'll
have transporters to all of them).


ndb/include/mgmapi/mgmapi.h:
  Add ndb_mgm_convert_to_transporter
   - converts to a transporter connect
   - destroys the handle (without disconnecting)
   - returns socket
ndb/include/transporter/TransporterRegistry.hpp:
  Add prototype for connect_ndb_mgmd
ndb/include/util/SocketClient.hpp:
  Remove connect_without_auth
  
  Add get_port() and get_server_name()
ndb/src/common/transporter/Transporter.cpp:
  use TransporterRegistry::connect_ndb_mgmd() to make the connection if isMgmConnection
ndb/src/common/transporter/TransporterRegistry.cpp:
  Impliment TransporterRegistry::connect_ndb_mgmd
  
  - takes a SocketClient and constructs a connectstring.
  - uses this connect string to make a NdbMgmHandle
  - send dynamic ports to this mgm server
  - transform into a transporter connect
  - return socket
ndb/src/common/util/SocketClient.cpp:
  Remove connect_without_auth
ndb/src/kernel/main.cpp:
  Don't relay dynamic ports. We now do this on transporter connect
ndb/src/mgmapi/mgmapi.cpp:
  Impliment ndb_mgm_convert_to_transporter
  - converts the mgm connection into a transporter connection
  - destroys the handle
  - returns the socket that should now be used as a transporter

ndb/include/util/SocketClient.hpp

@@ -35,8 +35,9 @@ public:
     m_port = port;
     m_servaddr.sin_port = htons(m_port);
   };
+  unsigned short get_port() { return m_port; };
+  char *get_server_name() { return m_server_name; };
   NDB_SOCKET_TYPE connect();
-  NDB_SOCKET_TYPE connect_without_auth();
   bool close();
 };