RTP matching rules: don't remove pt_table[packet.pt]

Fix for Issue #547

ortc.html

@@ -2791,7 +2791,7 @@ <h3>RTP matching rules</h3>
                 <p>
                     Else if <var>pt_table</var>[<var>packet.pt</var>] is set: set <var>rtp_receiver</var> to <var>pt_table</var>[<var>packet.pt</var>],
                     set <var>ssrc_table</var>[<var>packet.ssrc</var>] to <var>rtp_receiver</var>, set <var>pt_table</var>[<var>packet.pt</var>] to null
-                    and route the packet to <var>rtp_receiver</var>. Question: Do we remove all <var>pt_table</var>[<var>packet.pt</var>] entries set to <var>rtp_receiver</var>?
+                    and route the packet to <var>rtp_receiver</var>.
                 </p>
                 <p>Else if no matches are found in the <var>ssrc_table</var>, <var>muxId_table</var> or <var>pt_table</var>, fire the <code><a>unhandledrtp</a></code> event.</p>
             </section>