Ringct type 3 is not allowed from v11


```
2019-02-28 10:32:53.305 [RPC0]  TRACE   blockchain      src/cryptonote_core/blockchain.cpp:2351 Blockchain::check_tx_outputs                                                                            
2019-02-28 10:32:53.305 [RPC0]  ERROR   verify  src/cryptonote_core/blockchain.cpp:2437 Ringct type 3 is not allowed from v11                                                                           
2019-02-28 10:32:53.307 [RPC0]  INFO    txpool  src/cryptonote_core/tx_pool.cpp:213     Transaction with id= <3906846c2faddeb21a2d9499673c62c579b78547652ec91fcf28f45c1714f1a1> has at least one invalid output
2019-02-28 10:32:53.307 [RPC0]  DEBUG   perf    src/common/perf_timer.cpp:140   PERF        2      add_tx                                                                                               
2019-02-28 10:32:53.307 [RPC0]  ERROR   verify  src/cryptonote_core/cryptonote_core.cpp:960     Transaction verification failed: <3906846c2faddeb21a2d9499673c62c579b78547652ec91fcf28f45c1714f1a1>     
2019-02-28 10:32:53.307 [RPC0]  WARN    daemon.rpc      src/rpc/core_rpc_server.cpp:721 [on_send_raw_tx]: tx verification failed: invalid output                                                        
2019-02-28 10:32:53.307 [RPC0]  DEBUG   perf    src/common/perf_timer.cpp:140   PERF       18    on_send_raw_tx                                                                                         
2019-02-28 10:32:53.307 [RPC0]  DEBUG   net.http        src/rpc/core_rpc_server.h:96    /sendrawtransaction processed with 0/18/0ms
```