add and document "require_message_authenticator" flag

1 files changed, 8 insertions, 0 deletions

diff --git a/USAGE b/USAGE
index 0fce66b..fdd1e70 100644
--- a/USAGE
+++ b/USAGE
@@ -104,5 +104,13 @@ max_challenge=# - configure maximum number of challenges that a server
                   may request. This is a workaround for broken servers
                   and disabled by default.
 
+prompt_attribute - Enable honoring of Prompt attribute sent from server for 
+                   challenge-response to enable/disable of echoing of user 
+                   input. Without this option all user input during 
+                   challenge-response will be echoed. See RFC2869 Section 5.10
+
+require_message_authenticator - Discard Access-Accept, Access-Challenge, and
+		Access-Reject packets which do not contain Message-Authenticator.
+
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