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-rw-r--r--doc/spec/control-spec.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/spec/control-spec.txt b/doc/spec/control-spec.txt
index d6564dce96..433fd1006f 100644
--- a/doc/spec/control-spec.txt
+++ b/doc/spec/control-spec.txt
@@ -76,6 +76,12 @@ $Id$
Specific replies are mentioned below in section 3, and described more fully
in section 4.
+ [Compatibility note: versions of Tor before 0.2.0.3-alpha sometimes
+ generate AsyncReplies of the form "*(MidReplyLine / DataReplyLine)".
+ This is incorrect, but controllers that need to work with these
+ versions of Tor should be prepared to get multi-line AsyncReplies with
+ the final line (usually "650 OK") omitted.]
+
2.4. General-use tokens
; Identifiers for servers.