on how timers may be canceled, re-initialized, and canceled-then-re-initialized in nsITimer.idl (181961, r=pavlov, sr=alecf). This helps client code conserve instances, saving on cycles and malloc/component-manager froth. git-svn-id: svn://10.0.0.236/trunk@134739 18797224-902f-48f8-a5cc-f745e15eee43