CLI2: Added ::handleTerminator

- CLI2::handleTerminator removes all terminator arguments it finds
  and downgrades all subsequent arguments to Lexer::Type::word. This
  simplifies all further processing.

src/CLI2.h

@@ -110,6 +110,7 @@ private:
 */
   void handleArg0 ();
   void lexArguments ();
+  void handleTerminator ();
   void aliasExpansion ();
   void findOverrides ();
   void findCommand ();