man: Add monitoring output options.

videohubctrl.1

 \fB\-\-vo\-unlock\fR <out_X>
 Unlock output port X. If the port is locked by somebody else the
 port would be forcefully unlocked.
+.SH MONITORING OUTPUTS CONFIGURATION
+.PP
+.TP
+\fB\-\-mo\-name\fR <mout_X> <name>
+Set monitoring output port X name.
+.TP
+\fB\-\-mo\-input\fR <mout_X> <in_Y>
+Connect monitoring output X to video input Y.
+.TP
+\fB\-\-mo\-lock\fR <mout_X>
+Lock monitoring output port X.
+.TP
+\fB\-\-mo\-unlock\fR <mout_X>
+Unlock monitoring output port X. If the port is locked by somebody
+else the port would be forcefully unlocked.
 .SH MISC OPTIONS
 .PP
 .TP