Change RssFeed mime-type to "application/xml"
|Reported by:||Arthur Koziel||Owned by:||nobody|
|Has patch:||yes||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
Currently the RssFeed class returns RSS feeds with "application/rss+xml" as the mime-type. However, "application/rss+xml" isn't a valid registered mime-type at the IANA (http://www.iana.org/assignments/media-types/application/), so I'm proposing to change it to "application/xml" which seems to be widely used among other rss feeds.
Nice side effect: Firefox will highlight the XML properly when viewing its source, which makes debugging a little bit easier.