$term->Features
- Returns a reference to a hash whose keys are features present in the current implementation and whose values are those assigned to each feature. Several optional features are used in the minimal interface: appname should be present if the first argument to
new is recognized, and minline should be present if MinLine method is not a dummy. autohistory should be present if lines are put into history automatically (maybe subject to MinLine), and addhistory if the addhistory method is not a dummy.