$ wget -S http://blog.flameeyes.eu/articles.atom
...
HTTP/1.1 301 Moved Permanently
...
Location: https://blog.flameeyes.eu/articles.atom
Rss2email picks up on the 301 (in Feed._check_for_errors) and updates
the URL automatically :).
url = http://wireless.kernel.org/en/developers/Documentation/SubmittingPatches?diffs=1&show_att=1&action=rss_rc&unique=0&page=en%2Fdevelopers%2FDocumentation%2FSubmittingPatches&ddiffs=1
[feed.flameeyes]
-url = http://blog.flameeyes.eu/articles.atom
+url = https://blog.flameeyes.eu/articles.atom
[feed.peter-stuge]
url = http://peter.stuge.se/atom/1