Refactored media fetch with undici for http/2 support.

src/media.js

@@ -651,9 +651,10 @@ async function fetchHttpSource(source, tempFileTarget, hashStream) {
 	const res = await http.get(source.src, {
 		limits: 'media',
 		headers: {
-			host: new URL(source.src).hostname,
+			// explicit host not allowed in HTTP/2
+			// host: new URL(source.src).hostname,
+			// ...(source.host && { host: source.host }),
 			...(source.referer && { referer: source.referer }),
-			...(source.host && { host: source.host }),
 		},
 		stream: true, // sources are fetched in parallel, don't gobble up memory
 		followRedirects: source.followRedirects,