Fix typo in manpage

Patch by colinf via

   http://trac.jackaudio.org/attachment/ticket/227/typos.patch

man/jack_connect.0

@@ -5,7 +5,7 @@
 \fB jack_connect\fR [ \fI-s\fR | \fI--server servername\fR ] [\fI-h\fR | \fI--help\fR ] port1 port2
 \fB jack_disconnect\fR [ \fI-s\fR | \fI--server servername\fR ] [\fI-h\fR | \fI--help\fR ] port1 port2
 .SH DESCRIPTION
-\fBjack_connect\fR connects the two named ports. \fBjack_connect\fR disconnects the two named ports.
+\fBjack_connect\fR connects the two named ports. \fBjack_disconnect\fR disconnects the two named ports.
 .SH RETURNS
 The exit status is zero if successful, 1 otherwise