spec: Explicitly say that auth client and server take turns

This was (hopefully) implicit in the protocol descriptions, but we
never actually said it. Do so.

Signed-off-by: Simon McVittie <smcv@collabora.com>
Reviewed-by: Philip Withnall <withnall@endlessm.com>
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=104224

diff --git a/doc/dbus-specification.xml b/doc/dbus-specification.xml
index 860b10d70282bc4d77c5b431b372ef59370fbda9..a6b5e595b253042d4ac2347f9961dd27ada872ca 100644 (file)
--- a/doc/dbus-specification.xml
+++ b/doc/dbus-specification.xml
@@ -2238,7 +2238,9 @@
     </para>
     <para>
       In examples, "C:" and "S:" indicate lines sent by the client and
-      server respectively.
+      server respectively. The client sends the first line, and the
+      server must respond to each line from the client with a single-line
+      reply, with one exception: there is no reply to the BEGIN command.
     </para>
     <sect2 id="auth-protocol-overview">
       <title>Protocol Overview</title>