Docs: update refresh_pattern description regarding 'max' option

diff --git a/src/cf.data.pre b/src/cf.data.pre
index e7978d0566ba6475f29049af573674c0764f4ccd..59c104ed0e6a15e10e8f927abc0e6d991ceae116 100644 (file)
--- a/src/cf.data.pre
+++ b/src/cf.data.pre
@@ -5594,7 +5594,9 @@ DOC_START
        will be considered fresh.
 
        'Max' is an upper limit on how long objects without an explicit
-       expiry time will be considered fresh.
+       expiry time will be considered fresh. The value is also used
+       to form Cache-Control: max-age header for a request sent from
+       Squid to origin/parent.
 
        options: override-expire
                 override-lastmod