nonleadingdash handling: - doc: added "nonleadingdash" to UML class diagramm - nsf.c: added error message, when "noleadingdash" is used on non-positional parameters - nsf.c: use same logic for "nonleadingdash" to "value in argument" - nsf.c: deactivated rudimentary unknown handler for the time being - nx.tcl: added handling of parameter option "noleadingdash" in objectParameterSlots