record for posterity why some 2/3-char formats begin with a funny caret.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1611357 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/docs/manual/mod/mod_log_config.xml b/docs/manual/mod/mod_log_config.xml
index df07a75b1e3b6c2ce7d3e2e74cf3d86bac9938b6..14b6d7af5f81cdcfc2c9d61c13f496dfaaa9bdc0 100644 (file)
--- a/docs/manual/mod/mod_log_config.xml
+++ b/docs/manual/mod/mod_log_config.xml
@@ -341,6 +341,14 @@
       information when content caching is involved.</p>
       </note>
 
+      <note>
+      <p>Note: The '^' character at the start of three-character formats
+      has no significance, but it must be the first character of any newly 
+      added three-character format to avoid potential conflicts with log 
+      formats that use literals adjacent to a format specifier, such as 
+      "%Dus".</p>
+      </note>
+
     </section>
 
     <section id="examples"><title>Examples</title>