Improve Gateway authentication and static HTTP fidelity

test_honeypot.py

@@ -101,7 +101,7 @@ def main():
         wire_digest = hashlib.sha256(raw).hexdigest()
         # Wait for finally-recorded evidence after the response has closed.
         assert (pathlib.Path(workspace.name) / 'artifacts' / (wire_digest + '.bin')).read_bytes() == raw
-        assert b'200' in raw_request(b'CUSTOM / HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\n\r\n').split(b'\r\n')[0]
+        assert b'405' in raw_request(b'CUSTOM / HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\n\r\n').split(b'\r\n')[0]
         assert b'400' in raw_request(b'not-http\r\n')
         partial = b'PUT / HTTP/1.1\r\nHost: localhost\r\nContent-Length: 10\r\n\r\nabc'
         assert b'400' in raw_request(partial)