Better support for HTTP/1.0 and also related to persistent connection.

library/server/ewsgi/specification/stream/wgi_output_stream.e

@@ -74,6 +74,9 @@ feature -- Status writing
 
 feature -- Status report
 
+	http_version: detachable READABLE_STRING_8
+			-- Optional HTTP version.
+
 	is_available: BOOLEAN
 			-- Is output available?
 			--| i.e: no issue with associated output stream, like closed socket, or related?
@@ -85,6 +88,16 @@ feature -- Status report
 		deferred
 		end
 
+feature -- Element change
+
+	set_http_version (v: like http_version)
+			-- Set `http_version' to `v'.
+		require
+			valid_version: v /= Void implies v.starts_with ("HTTP/")
+		do
+			http_version := v
+		end
+
 feature -- Basic operations
 
 	flush