Fix incorrect description in mosquitto_ctrl man page.

Closes #1995. Thanks to fyta2000.

ChangeLog.txt

@@ -11,6 +11,7 @@ Broker:
 
 Apps:
 - Disallow control characters in mosquitto_passwd usernames.
+- Fix incorrect description in mosquitto_ctrl man page. Closes #1995.
 
 
 2.0.4 - 2020-12-22

man/mosquitto_ctrl.1.xml

@@ -78,9 +78,7 @@
 
 	<refsect1>
 		<title>Description</title>
-		<para><command>mosquitto_ctrl</command> is a simple MQTT version 5/3.1.1
+		<para><command>mosquitto_ctrl</command> is a tool for helping configure a Mosquitto broker instance.</para>
-			client that will publish a single message on a topic and
-			exit.</para>
 	</refsect1>
 
 	<refsect1>