[3784] Removed spurious printf parameter in keactrl.

src/bin/keactrl/keactrl.in

@@ -61,7 +61,7 @@ is_in_list() {
 # Prints keactrl usage.
 usage() {
     printf "usage is %s command [-c keactrl-config-file] [-s server[,server,..]]\n" $( basename ${0} )
-    printf "commands: start stop reload status\n" $( basename ${0} )
+    printf "commands: start stop reload status\n"
 }
 
 ### Functions managing Kea processes ###