8ad14f93fd
Changing behavior of sealed objects to throw an exception on any attempt to modify them including changing values of existing properties. In the same time making object sealed does not affect read-only status of its properties which allows to override properties of objects with a sealed object as a prototype. Rhino shell now accepts -sealedlib option to seal all standard objects. git-svn-id: svn://10.0.0.236/trunk@142545 18797224-902f-48f8-a5cc-f745e15eee43