fixed typo in tcpclient man page

ucspi-tcp-x/tcpclient.9

@@ -21,7 +21,7 @@ is provided or omitted, \fBtcpclient\fR does one of the two things below.
 
 if \fIprog\fR is provided, it runs \fIprog\fR, with descriptor 6 reading
 from the network/socket and descriptor 7 writing to the network/socket. It
-also sets up several environment variables (see .BR tcp-environ (5)).
+also sets up several environment variables (see \fBtcp-environ\fR(5)).
 
 If \fIprog\fR is omitted, \fBtcpclient\fR enters client mode where it
 passes data from descriptor 0 to the network and data from the network to