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 4b8af8bc167b08e7744cd2bf93de9d637ca863a2..49d12b6a9ad54d10e4ad1dbb3d27a3fca67ef44b 100644 (file)
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -1,4 +1,4 @@
-
+
 
  
   <application>libpq</application> - C Library
@@ -4356,6 +4356,13 @@ service names and parameters. This file can be used for client-only
 installs too. The file's location can also be specified by the
 PGSYSCONFDIR environment variable.
 
+
+
+To set environment variables on Windows, from My Computer,
+choose View System Information, and from the Advanced
+tab, choose Environment Variables, then add a user or system
+variable.
+