Add a packed renegotiation test.

Ridiculous as it is, the protocol does not forbid packing HelloRequest
and Finished into the same record. Add a test for this case.

Change-Id: I8e1455b261f56169309070bf44d14d40a63eae50
Reviewed-on: https://boringssl-review.googlesource.com/8901
Reviewed-by: Steven Valdez <svaldez@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
diff --git a/ssl/test/runner/runner.go b/ssl/test/runner/runner.go
index fd263e6..f8cb4d9 100644
--- a/ssl/test/runner/runner.go
+++ b/ssl/test/runner/runner.go
@@ -5021,6 +5021,24 @@
 		},
 	})
 
+	// Test renegotiation works if HelloRequest and server Finished come in
+	// the same record.
+	testCases = append(testCases, testCase{
+		name: "Renegotiate-Client-Packed",
+		config: Config{
+			MaxVersion: VersionTLS12,
+			Bugs: ProtocolBugs{
+				PackHandshakeFlight:          true,
+				PackHelloRequestWithFinished: true,
+			},
+		},
+		renegotiate: 1,
+		flags: []string{
+			"-renegotiate-freely",
+			"-expect-total-renegotiations", "1",
+		},
+	})
+
 	// Renegotiation is forbidden in TLS 1.3.
 	//
 	// TODO(davidben): This test current asserts that we ignore