[BUGFIX] fix text/html content type

content-type is now text/xml

Configuration/TypoScript/Frontend/setup.typoscript

@@ -23,10 +23,16 @@ newsFeed {
 
 	config {
 		disableAllHeaderCode = 1
-		additionalHeaders = Content-type:text/xml
+		disableCharsetHeader = 1
 		no_cache = 1
 		xhtml_cleaning = 0
 		index_enable = 0
+		additionalHeaders {
+			10 {
+				header = Content-Type:text/xml
+				replace = 0
+			}
+		}
 	}
 }