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 
{
            RPCHelpMan{"getblockhash",
                "\nReturns hash of block in best-block-chain at height provided.\n",
                {
                    {"height", RPCArg::Type::NUM, RPCArg::Optional::NO, "The height index"},
                },
                RPCResult{
                    RPCResult::Type::STR_HEX, "", "The block hash"},
                RPCExamples{
                    HelpExampleCli("getblockhash", "1000")
            + HelpExampleRpc("getblockhash", "1000")
                },
            }.Check(request);
    LOCK(cs_main);
    int nHeight = request.params[0].get_int();
    if (nHeight < 0 || nHeight > ::ChainActive().Height())
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Block height out of range");
    CBlockIndex* pblockindex = ::ChainActive()[nHeight];
    return pblockindex->GetBlockHash().GetHex();
}
static UniValue getblockheader(const JSONRPCRequest& request)