add a note about generating agefile in hook

diff --git a/cgitrc.5.txt b/cgitrc.5.txt
index 9d0c08997298ea6c5e8583c6c874fe7ef004ea69..8b0ad21270d992fdebcc3469188df7b64a875a2f 100644 (file)
--- a/cgitrc.5.txt
+++ b/cgitrc.5.txt
@@ -39,7 +39,8 @@ agefile::
        to specify the date and time of the youngest commit in the repository.
        The first line in the file is used as input to the "parse_date"
        function in libgit. Recommended timestamp-format is "yyyy-mm-dd
-       hh:mm:ss". Default value: "info/web/last-modified".
+       hh:mm:ss". You may want to generate this file from a post-receive
+       hook. Default value: "info/web/last-modified".
 
 branch-sort::
        Flag which, when set to "age", enables date ordering in the branch ref