QUIC: Add glossary entry for RIO

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23495)

diff --git a/doc/designs/quic-design/glossary.md b/doc/designs/quic-design/glossary.md
index 1cf0f06cddda446a0dfd26aa4f4485c20fceb817..831890d38200624fee88b6ae0e545f5f57fc024a 100644 (file)
--- a/doc/designs/quic-design/glossary.md
+++ b/doc/designs/quic-design/glossary.md
@@ -214,6 +214,9 @@ frame which was transmitted. See FIFM design document for details.
 **Remotely-initiated:** Refers to a QUIC stream which was initiated by the
 remote peer, rather than by the local application.
 
+**RIO:** Reactive I/O subsystem. Refers to the generic, non-QUIC specific parts
+of the asynchronous I/O handling code which the OpenSSL QUIC stack is built on.
+
 **RSTREAM:** Receive stream. Internal receive buffer management object used to
 store data which has been RX'd but not yet read by the application.