1:  404247348f6 ! 1:  5226023d62d doc: Expand upon protocol versions and extensions
    @@ Commit message
         considered splitting this in two as well, but then the first table would
         be empty for a long while, which seemed silly.)
     
    +    Reviewed-by: Jelte Fennema-Nio <postgres@jeltef.nl>
         Discussion: https://postgr.es/m/DDPR5BPWH1RJ.1LWAK6QAURVAY%40jeltef.nl
     
      ## doc/src/sgml/protocol.sgml ##
    -@@
    -   </sect2>
    - 
    -   <sect2 id="protocol-versions">
    --   <title>Protocol Versions</title>
    -+   <title>Protocol Versions and Extensibility</title>
    - 
    -    <para>
    -     The current, latest version of the protocol is version 3.2. However, for
     @@
         <para>
          <xref linkend="protocol-versions-table"/> shows the currently supported
    @@ doc/src/sgml/protocol.sgml
     +     </tbody>
     +    </tgroup>
     +   </table>
    ++  </sect2>
    ++
    ++  <sect2 id="protocol-extensions">
    ++   <title>Protocol Extensions</title>
     +
    -+   <para id="protocol-extensions">
    ++   <para>
     +    Servers and clients may additionally negotiate individual extensions to the
     +    protocol version in use. These are offered by the client as specially-named
     +    parameters in the startup message. Servers reject any unknown or unsupported
2:  11e57bed6f6 = 2:  70ec7e40210 libpq: Prepare for protocol grease during 19beta
3:  9af87739be8 = 3:  f7bc17c458f libpq: Grease the protocol by default
-:  ----------- > 4:  0bf4aa4d014 squash! doc: Expand upon protocol versions and extensions