Upgrade is split header.

Author: ioquatix

lib/protocol/http/headers.rb

@@ -350,7 +350,7 @@ def merge(headers)
 
 				# Connection handling:
 				"connection" => Header::Connection,
-				"upgrade" => false,
+				"upgrade" => Header::Split,
 
 				# Cache handling:
 				"cache-control" => Header::CacheControl,