Work-around restricted file names under Windows #760

If you have namespace with one of the names

aux, con, nul, prn, com1 .. com9, and lpt1 ..lpt9

... Then Link cannot create the folder under Windows.

Link can work around the problem by using (∊1 ⎕NPARTS ...) on the namespace name before trying to create the directory. It is possible to create a folder called "c:\lpt1", but not "lpt1".