opcode is private (API Change):

* The opcode enum is removed.

Actions Required:

* Remove all occurences of the `opcode` enum at call sites

doc/quickref.xml

@@ -129,7 +129,6 @@
           <simplelist type="vert" columns="1">
             <member><link linkend="beast.ref.websocket__close_code">close_code</link></member>
             <member><link linkend="beast.ref.websocket__error">error</link></member>
-            <member><link linkend="beast.ref.websocket__opcode">opcode</link></member>
           </simplelist>
         </entry>
       </row>