remote attachment in feed test for thunderbird (X-Mozilla-External-Attachment-URL)

test.atom

<?xml version="1.0" encoding="utf-8"?>
<rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0" xmlns:wfw="http://wellformedweb.org/CommentAPI/">
<channel>
    <title>test</title>
    <description>testing remote attachment in feed</description>
    <atom:link href="http://example.com" rel="next"></atom:link>
    <link>http://example.com</link>
    <item>
        <title>test</title>
        <description>test</description>
        <enclosure url="http://i.imgur.com/qNJBspW.jpg" length="19141" type="image/jpeg"></enclosure>
    </item>
</channel>
</rss>