httphttp-headersrssmime-typessimplepie

Comma-separated list valid in Content-Type header?

An RSS feed provider recently started sending this in its response headers:

Content-type: application/rss+xml, text/xml; charset=UTF-8

To support this provider, I needed to change a line in a feed integration package (SimplePie)

  1. Is the provider "wrong?"
  2. Would it be "wrong" to change a community-maintained package to support this header?
Solution
    1. Yes - Content-Type doesn't take a list. Apparently somebody confused "Content-Type" with "Accept".
    2. Yes.