AuSync(3nas) on Linux
The text cc14189313f9, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it. The page shows this text now.
flush the output buffer and wait for all events and errors to be processed by the server