add some descriptions to the placeholders

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1818341 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/mod_log_config.xml b/docs/manual/mod/mod_log_config.xml
index f4de7d3430fec13190b3457026926fc51b0f7ada..0434cdc7ba60cc107da57b603c0d426ea92b37e8 100644 (file)
--- a/docs/manual/mod/mod_log_config.xml
+++ b/docs/manual/mod/mod_log_config.xml
@@ -109,10 +109,13 @@
         for only a few hosts, you probably have access control
         directives mentioning them by name. See <a
         href="mod_authz_host.html#reqhost">the Require host
-        documentation</a>.</td></tr>
+        documentation</a>. This format is affected by modifications to the 
+        remote hostname by modules like <module>mod_remoteip</module>.</td></tr>
 
     <tr><td><code>%{c}h</code></td>
-        <td></td></tr>
+        <td>Like <code>%h</code>, but always reports on the hostname of the
+        underlying TCP connection and not any modifications to the 
+        remote hostname by modules like <module>mod_remoteip</module>.</td></tr>
 
     <tr><td><code>%H</code></td>
         <td>The request protocol.</td></tr>
@@ -147,7 +150,9 @@
             matching error log line to see what request caused what error.</td></tr>
 
     <tr><td><code>%{c}L</code></td>
-        <td></td></tr>
+        <td>The connection log ID from the error log (or '-' if nothing has been
+            logged to the error log for this request). Look for the
+            matching error log line to see what request caused what error.</td></tr>
 
     <tr><td><code>%m</code></td>
         <td>The request method.</td></tr>