Fix Bug #578; OPENWRITE, OPENREAD, OPENAPPEND, and OPENUPDATE can now open files with names that have special characters quoted by vertical bars.
The problem was that the remapping of the special characters that marked them as vbarred wasn't undone before passing the filename to fopen().
Authored by: david_costanzo 2021-10-21
Parent: [r5807]
Child: [r5809]