doc: Add documentation for PGLOADBALANCEHOSTS environment variable in libpq.

MasaoFujii · MasaoFujii · commit 0a16512d40a5 · 2023-04-21T16:46:41.000+09:00
Commit 7f5b198 introduced the PGLOADBALANCEHOSTS environment variable for connection load balancing in libpq. However, documentation for this variable was missing. Author: Fujii Masao Reviewed-by: Jelte Fennema Discussion: https://postgr.es/m/e2b44cf7-aa16-e726-1d4a-a69508ebf6b9@oss.nttdata.com
diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
@@ -8307,6 +8307,16 @@ myEventProc(PGEventId evtId, void *evtInfo, void *passThrough)
       linkend="libpq-connect-target-session-attrs"/> connection parameter.
      </para>
     </listitem>
+
+    <listitem>
+     <para>
+      <indexterm>
+       <primary><envar>PGLOADBALANCEHOSTS</envar></primary>
+      </indexterm>
+      <envar>PGLOADBALANCEHOSTS</envar> behaves the same as the <xref
+      linkend="libpq-connect-load-balance-hosts"/> connection parameter.
+     </para>
+    </listitem>
    </itemizedlist>
   </para>
 
