Jsonpath GIN support

Author: Nikita Glukhov

doc/src/sgml/gin.sgml

@@ -102,13 +102,17 @@
        <literal>?&amp;</literal>
        <literal>?|</literal>
        <literal>@&gt;</literal>
+       <literal>@?</literal>
+       <literal>@~</literal>
       </entry>
      </row>
      <row>
       <entry><literal>jsonb_path_ops</literal></entry>
       <entry><type>jsonb</type></entry>
       <entry>
        <literal>@&gt;</literal>
+       <literal>@?</literal>
+       <literal>@~</literal>
       </entry>
      </row>
      <row>