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`

CInv inv(MSG_TX, hash);
            if (pfrom->pfilter) {
                CTransaction tx;
                bool fInMemPool = mempool.lookup(hash, tx);
                if (!fInMemPool) continue; 
                if (!pfrom->pfilter->IsRelevantAndUpdate(tx)) continue;
            }
            if (pfrom->minFeeFilter) {
                CFeeRate feeRate;
                mempool.lookupFeeRate(hash, feeRate);
                LOCK(pfrom->cs_feeFilter);
                if (feeRate.GetFeePerK() < pfrom->minFeeFilter)
                    continue;
            }
            vInv.push_back(inv);
            if (vInv.size() == MAX_INV_SZ) {
                pfrom->PushMessage(NetMsgType::INV, vInv);
                vInv.clear();
            }
        }
        if (vInv.size() > 0)
            pfrom->PushMessage(NetMsgType::INV, vInv);
    }
    else if (strCommand == NetMsgType::PING)