which has the same effect as specifying this argument
as a pointer to a list containing a single NULL pointer.
.B "Do not take advantage of this misfeature!"
-It is non-standard and non-portable:
+It is nonstandard and non-portable:
on most other Unix systems doing this will result in an error
.RB ( EFAULT ).
.\" e.g., EFAULT on Solaris 8 and FreeBSD 6.1; but