Merge branch 'master' of https://github.com/vvvv/VL.IO.MQTT

Author: antongit

help/HowTo Publish and receive data via a broker.vl

@@ -406,6 +406,15 @@
             </Patch>
             <Pin Id="DjHAEmBAdjKPA4h3haxvOp" Name="Node Context" Kind="InputPin" IsHidden="true" />
           </Node>
+          <Pad Id="IIr8T2fnpk3Ow8d68MpY5q" Bounds="289,584,199,78" ShowValueBox="true" isIOBox="true" Value="&lt; In order to clear a retained message, send a message to the topic with the &quot;Retain&quot; flag on and an empty payload!">
+            <p:TypeAnnotation LastCategoryFullName="Primitive" LastDependency="VL.CoreLib.vl">
+              <Choice Kind="TypeFlag" Name="String" />
+            </p:TypeAnnotation>
+            <p:ValueBoxSettings>
+              <p:fontsize p:Type="Int32">9</p:fontsize>
+              <p:stringtype p:Assembly="VL.Core" p:Type="VL.Core.StringType">Comment</p:stringtype>
+            </p:ValueBoxSettings>
+          </Pad>
         </Canvas>
         <Patch Id="GUsazFg1H4eLoKT3wTx1Gl" Name="Create" />
         <Patch Id="GtlRcTZ7gYeMKoWQ1coRAa" Name="Update" />