Changelog for #376.

Author: lemon24

CHANGES.rst

@@ -11,6 +11,13 @@ Version 3.21
 
 Unreleased
 
+* During :ref:`scheduled updates <scheduled>`,
+  honor the Cache-Control max-age and Expires HTTP headers.
+  (:issue:`376`)
+
+  * Also, if the Retry-After is a date,
+    make the update interval relative to Date.
+
 
 Version 3.20
 ------------

docs/guide.rst

@@ -289,9 +289,9 @@ such that updates don't happen exactly at the the same time;
 for example, with a one-hour interval, a jitter of 0.25 means
 updates will occur any time in the first 15 minutes of each hour.
 
-If the server sends the Retry-After HTTP header with
-429 Too Many Requests or 503 Service Unavailable responses,
-:meth:`update_feeds(scheduled=True) <Reader.update_feeds>` will honor it.
+If the server responds with any of the
+Cache-Control max-age, Expires, or Retry-After HTTP headers,
+:meth:`update_feeds(scheduled=True) <Reader.update_feeds>` will honor them.
 
 
 .. note::
@@ -308,6 +308,9 @@ If the server sends the Retry-After HTTP header with
 .. versionchanged:: 3.15
     Honor the Retry-After HTTP header.
 
+.. versionchanged:: 3.21
+    Honor the Cache-Control max-age and Expires HTTP headers.
+
 
 Update status
 ~~~~~~~~~~~~~