Add support for getting events via mgmapi
removed all traces of stat port


BitKeeper/deleted/.del-NodeLogLevel.cpp~324045b93af7123b:
  Delete: ndb/src/mgmsrv/NodeLogLevel.cpp
BitKeeper/deleted/.del-NodeLogLevel.hpp~4f4ab0fe52fb497c:
  Delete: ndb/src/mgmsrv/NodeLogLevel.hpp
BitKeeper/deleted/.del-NodeLogLevelList.cpp~97dc9c909e3e92bf:
  Delete: ndb/src/mgmsrv/NodeLogLevelList.cpp
BitKeeper/deleted/.del-NodeLogLevelList.hpp~ef567dd850abddc7:
  Delete: ndb/src/mgmsrv/NodeLogLevelList.hpp
ndb/include/debugger/EventLogger.hpp:
  Split EventLogger into two classes
ndb/include/kernel/LogLevel.hpp:
  Add some nice to have methods + use uint8 for storage
ndb/include/kernel/signaldata/EventSubscribeReq.hpp:
  operator=
ndb/include/kernel/signaldata/SetLogLevelOrd.hpp:
  operator=
ndb/include/mgmapi/mgmapi.h:
  remove deprecated vars
ndb/src/common/debugger/EventLogger.cpp:
  Split into 2
ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp:
  Remove hardcoded mgm stuff
ndb/src/mgmsrv/CommandInterpreter.cpp:
  #if 0
  some deprecated code
ndb/src/mgmsrv/Makefile.am:
  remove NodeLogLevel*
ndb/src/mgmsrv/MgmtSrvr.cpp:
  Remove dead code
  Handle multiple event listeners in mgmapi
ndb/src/mgmsrv/MgmtSrvr.hpp:
  Remove dead code
  Handle multiple event listeners in mgmapi
ndb/src/mgmsrv/Services.cpp:
  listen event method in mgmapi
ndb/src/mgmsrv/Services.hpp:
  listen event method in mgmapi
ndb/src/mgmsrv/main.cpp:
  remove stat port