Be specific about which environment variables can be used in

expansions in the server configuration file.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@906779 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/configuring.xml b/docs/manual/configuring.xml
index 390a88ca85e8be67a00ee5bad2d8c59953e708a2..c0efc00e3d50e86da2f6d88c465de7726ee74192 100644 (file)
--- a/docs/manual/configuring.xml
+++ b/docs/manual/configuring.xml
@@ -87,6 +87,12 @@ HTTP server.</p>
     unchanged for use by later stages in the config file
     processing.)</p>
 
+    <p>Only environment variables defined before the server is started
+    can be used in expansions.  Variables defined in the
+    configuration file itself, for example with <directive
+    module="mod_env">SetEnv</directive>, take effect too late to be
+    used for expansions in the configuration file.</p>
+
     <p>The maximum length of a line in the configuration file, after
     environment-variable substitution, joining any continued lines and
     removing leading and trailing white space, is 8192 characters.</p>