After starting from command line bitocoind, it can require minutes to have bitocoind to be real responsive, for example:
`$ ./bitcoin-cli stop`
`error: {"code":-28,"message":"Activating best chain..."}`

In such situation, I had sometimes to "kill -9" bitcoind to stop it.
I would like to be able to stop bitcoind in clean way.

p.s.:
`$ uname -a`
`Darwin isghe.local 14.4.0 Darwin Kernel Version 14.4.0: Thu May 28 11:35:04 PDT 2015; root:xnu-2782.30.5~1/RELEASE_X86_64 x86_64`

if (chainActive.Height() > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate)) {
                            BOOST_REVERSE_FOREACH(const uint256& hash, vHashes) {
                                pnode->PushBlockHash(hash);
                            }
                        }
                    }
                }
                
                if (!vHashes.empty()) {
                    GetMainSignals().UpdatedBlockTip(pindexNewTip);
                }
            }
        }
    } while(pindexMostWork != chainActive.Tip());
    CheckBlockIndex(chainparams.GetConsensus());
    
    if (!FlushStateToDisk(state, FLUSH_STATE_PERIODIC)) {
        return false;
    }
    return true;
}
bool InvalidateBlock(CValidationState& state, const Consensus::Params& consensusParams, CBlockIndex *pindex)
{
    AssertLockHeld(cs_main);