MSDOSFSMNT_MNTOPT
pmp->pm_flags |= argp->flags & MSDOSFSMNT_MNTOPT;
if (args.flags & MSDOSFSMNT_MNTOPT) {
pmp->pm_flags &= ~MSDOSFSMNT_MNTOPT;
pmp->pm_flags |= args.flags & MSDOSFSMNT_MNTOPT;