update acks (#1013)

w3c · Jul 26, 2018 · 243e72f · 243e72f
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@@ -5423,6 +5423,9 @@ Johan Verrept,
 and
 Boris Zbarsky.
 
+Thanks to Adam Powers for creating the overall [=registration=] and [=authentication=] flow diagrams
+([Figure 1](#fig-registration) and [Figure 2](#fig-authentication)).
+
 We thank
 Anthony Nadalin,
 John Fontana,