Calling `*txoutset` calls in the console has been broken since #19056. The addition of the `RpcInterruptionPoint()` calls means that any user running the GUI without passing `-server`, will just see ["Shutting down"](https://github.com/bitcoin/bitcoin/blob/b33136b6ba9887f7db651c4c5264ca7f2f601df7/src/rpc/server.cpp#L325) printed to the console:

![console](https://user-images.githubusercontent.com/863730/84460760-55599a80-ac9d-11ea-8720-a718edde75dd.png)

cc @MarcoFalke 
},
                RPCExamples{
                    HelpExampleCli("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
            + HelpExampleRpc("getblockheader", "\"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09\"")
                },
            }.Check(request);
    uint256 hash(ParseHashV(request.params[0], "hash"));
    bool fVerbose = true;
    if (!request.params[1].isNull())
        fVerbose = request.params[1].get_bool();
    const CBlockIndex* pblockindex;
    const CBlockIndex* tip;
    {
        LOCK(cs_main);
        pblockindex = LookupBlockIndex(hash);
        tip = ::ChainActive().Tip();
    }
    if (!pblockindex) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block not found");
    }
    if (!fVerbose)
    {
        CDataStream ssBlock(SER_NETWORK, PROTOCOL_VERSION);
        ssBlock << pblockindex->GetBlockHeader();
        std::string strHex = HexStr(ssBlock);
        return strHex;
    }
    return blockheaderToJSON(tip, pblockindex);
}
static CBlock GetBlockChecked(const CBlockIndex* pblockindex)