snarfed
if a source's web site doesn't pass verify(), try one of its post permalinks
some tumblr blogs only turn on disqus on the individual post pages, not on the front page. example: require.aorcsik.com front page vs individual post. we currently only check the front page, so we complain and say they haven't added disqus when they actually have.
we could expand our discovery to look at the first post link on the front page too.
same thing happens for webmention endpoints on some indie domains.
another example: https://www.brid.gy/tumblr/paulo-pinto.com , http://paulo-pinto.com/post/98836498579/1 .
current idea: when superfeedr sends us a new blog post for an unverified source, we attempt to verify it (e.g. discover the disqus shortname) using that post's markup.
...sadly, verifying against the markup superfeedr sends us won't actually work, since they only send an HTML snippet with the content, which usually omits the disqus script or other site metadata we usually need for verifying.
for example, this is what we get for http://andthenitcametotheend.tumblr.com/post/82533820686:
<img src="http://31.media.tumblr.com/36900762a5d45f1680d35ee62b51754e/tumblr_n2fah9QB971rmp97po1_500.jpg"/><br/><br/><p><a href="http://vintagelibraries.tumblr.com/post/79546008180/public-library-of-cincinnati-hamilton" class="tumblr_blog">vintagelibraries</a>:</p>
<blockquote><p>Public Library of Cincinnati & Hamilton County,\xa0Card Catalog, year unknow.</p></blockquote>