Fix extraction of Atom <content type="text"> and <content type="html">; we were failing to escape plaintext source data to HTML, and doing an extraneous double-deescape on HTML source resulting in breakage of notices containing text that looks like HTML. Only <content type="xhtml"> was working correctly previously.
Fixes for RSS2 content processing: we were failing to load <content:encoded> at all due to using wrong element name, and were applying an extraneous de-escape for <description> rather than the escaping that is required to turn plaintext into HTML. (Per spec, <description> must be plaintext.)
First steps to parsing RSS items as activities. RSS feeds don't seem
to have enough data to make good remote profiles, but this may work
with some "hints".
We've been making pretty crummy tag: URIs for a while. We should
continue to favor HTTP URIs, since it's nice to be able to discover
things about an object you've shared the ID of. Where that's not
possible, this makes nicer tag URIs.
URLs with paths followed by a double-quote character are incorrectly including the quote in the URL. The double-quote character is in fact not a legal URL char and must be URL-escaped; more importantly it just causes oddities when you quote a message ending in a URL -- such as when using the redent-button experimental feature.
After removing 103 false positives, this leaves 4 actually broken tests, showing two failure modes for mail links:
* 'mail without mailto' formatting shortcut in common_linkify didn't get the 'title' attribute added with the other URLs
* links including mailto: protocol are being incorrectly expanded to http: protocol in the long URL
Canon urls that have a protocol followed by a host (and no path) automatcally get a trailing slash by the canon function - make the unit test match that
