ndb - bug#17150

  ndb_mgmd limited no of api nodes, by restricting no of mgmsessions
  (these are used for dynamic port allocation)


ndb/include/util/SocketServer.hpp:
  Increase default max session to ~0
ndb/src/common/util/SocketServer.cpp:
  Increase default max session to ~0

ndb/include/util/SocketServer.hpp

@@ -74,7 +74,7 @@ public:
   /**
    * Constructor / Destructor
    */
-  SocketServer(int maxSessions = 32);
+  SocketServer(unsigned maxSessions = ~(unsigned)0);
   ~SocketServer();
   
   /**

ndb/src/common/util/SocketServer.cpp

@@ -27,7 +27,7 @@
 
 #define DEBUG(x) ndbout << x << endl;
 
-SocketServer::SocketServer(int maxSessions) :
+SocketServer::SocketServer(unsigned maxSessions) :
   m_sessions(10),
   m_services(5)
 {
@@ -124,7 +124,7 @@ SocketServer::setup(SocketServer::Service * service,
     DBUG_RETURN(false);
   }
   
-  if (listen(sock, m_maxSessions) == -1){
+  if (listen(sock, m_maxSessions > 32 ? 32 : m_maxSessions) == -1){
     DBUG_PRINT("error",("listen() - %d - %s",
 			errno, strerror(errno)));
     NDB_CLOSE_SOCKET(sock);