docs: Clarify CGI meta-variables terminology in env.xml (bz 70095)

The introductory paragraph incorrectly implied that HTTP defines
environment variables. Reword to accurately describe the relationship:
RFC 3875 defines meta-variables (many derived from HTTP headers), and
httpd exposes them as environment variables.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1935410 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/env.xml b/docs/manual/env.xml
index 72f042144a12bddf29e40e004afb5195357dbef2..26d2dfe99f15811794f63444386e260e558548c3 100644 (file)
--- a/docs/manual/env.xml
+++ b/docs/manual/env.xml
@@ -303,9 +303,11 @@
   <section id="cgi">
     <title>CGI environment variables</title>
 
-    <p>The CGI specification (<rfc section="4.1">3875</rfc>) defines a number of environment
-    variables that expand on those defined by the HTTP spec.
-    These have been adopted more broadly, and are a standard
+    <p>The CGI specification (<rfc section="4.1">3875</rfc>) defines a
+    number of meta-variables, many of which derive their values from
+    HTTP request headers. Apache httpd makes these available as
+    environment variables to CGI scripts and other request-processing
+    mechanisms. These have been adopted more broadly, and are a standard
     part of passing information between the browser and the
     server, and between processes on the server side. Here we
     discuss a few of these. For the complete list of request