* _GSocket_Enable_Events() and _GSocket_Disable_Events() now call

* _GSocket_Enable_Events() and _GSocket_Disable_Events() now call
  CFRunLoopAddSource() and CFRunLoopRemoveSource() respectively.  They
  no longer call CFSocketEnableCallbacks or CFSocketDisableCallbacks.
* In _GSocket_Get_Mac_Socket() no longer disable callbacks and also do not
  add the runloop source which combined with the above change has the
  same effect as before.
* In _GSocket_GUI_Destroy_Socket() do not remove the runloop source because
  _GSocket_Disable_Events() should have and even if it didn't Mac OS X
  will clean it up in CFSocketInvalidate()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25166 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775