crypto/tls: fix typo in tls handshake error

Change-Id: Ia9f39250619ea6e94157efceddfb2e02d35f3ae2
Reviewed-on: https://go-review.googlesource.com/7041Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>

src/crypto/tls/handshake_server.go

@@ -229,7 +229,7 @@ Curves:
 			// The client is doing a fallback connection.
 			if hs.clientHello.vers < c.config.maxVersion() {
 				c.sendAlert(alertInappropriateFallback)
-				return false, errors.New("tls: client using inppropriate protocol fallback")
+				return false, errors.New("tls: client using inappropriate protocol fallback")
 			}
 			break
 		}

src/crypto/tls/handshake_server_test.go

@@ -780,7 +780,7 @@ func TestFallbackSCSV(t *testing.T) {
 		config: serverConfig,
 		// OpenSSL 1.0.1j is needed for the -fallback_scsv option.
 		command: []string{"openssl", "s_client", "-fallback_scsv"},
-		expectHandshakeErrorIncluding: "inppropriate protocol fallback",
+		expectHandshakeErrorIncluding: "inappropriate protocol fallback",
 	}
 	runServerTestTLS11(t, test)
 }