fixup! multi: Support jumbo size om packets

Author: gijswijs

sphinx_test.go

@@ -987,7 +987,7 @@ func TestSphinxHopVariableSizedPayloads(t *testing.T) {
 					Payload: bytes.Repeat([]byte("a"), 500),
 				},
 			},
-			expectedError: ErrStandardRoutingInfoSizeExceeded,
+			expectedError: ErrStandardRoutingPayloadSizeExceeded,
 		},
 	}