Issue #17849: Raise sensible exception for invalid HTTP tunnel response

Initial patch from Cory Benfield.
diff --git a/Misc/ACKS b/Misc/ACKS
index ba3e3fe..59d0914 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -107,6 +107,7 @@
 Thomas Bellman
 Alexander “Саша” Belopolsky
 Eli Bendersky
+Cory Benfield
 David Benjamin
 Oscar Benjamin
 Andrew Bennetts