-a pairs of hex digits for each byte in the address or port number when
-expressed in network byte order.
-.PP
-.B helper
-will not bind to ports 512 and onwards, because programs like
-.B rshd
-expect these to be used for outgoing connections, so allowing a user
-to bind to one of these would open up security hole(s).
+a pair of hex digits for each byte in the address or port number when
+expressed in host byte order. For example, the port argument is the
+result of something like
+.B sprintf(arg,
+.B """%04X"",
+.BR sin.sin_port) .
+.I addr6-hex
+should be a string of 32 hex digits, being a pair for each byte in
+the address, in network byte order.