Add documentation for Windows on how to set an environment variable.

Backpatch to 8.2.X.

diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index c6e60724fd8488e7936352a059175535727f0871..94f1fdb5a1bd98497363d608a4af71fa281babf1 100644 (file)
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -4350,6 +4350,13 @@ service names and parameters. This file can be used for client-only
 installs too. The file's location can also be specified by the
 <envar>PGSYSCONFDIR</envar> environment variable.
 </para>
+
+<para>
+To set environment variables on Windows, from <literal>My Computer</>,
+choose <literal>View System Information</>, and from the <literal>Advanced</>
+tab, choose <literal>Environment Variables</>, then add a user or system
+variable.
+</para>
 </sect1>