Moving from margo_init_opt to margo_init_ext

void

init_rpc_server() {

    hg_addr_t addr_self;

    hg_addr_t addr_self = nullptr;

    hg_size_t addr_self_cstring_sz = 128;

    char addr_self_cstring[128];

    struct hg_init_info hg_options = HG_INIT_INFO_INITIALIZER;

    hg_options.auto_sm = GKFS_DATA->use_auto_sm() ? HG_TRUE : HG_FALSE;

    hg_options.stats = HG_FALSE;

    hg_options.na_class = nullptr;

    if(gkfs::rpc::protocol::ofi_psm2 == GKFS_DATA->rpc_protocol())

        hg_options.na_init_info.progress_mode = NA_NO_BLOCK;

    // Start Margo (this will also initialize Argobots and Mercury internally)

    auto mid = margo_init_opt(GKFS_DATA->bind_addr().c_str(), MARGO_SERVER_MODE,

                              &hg_options, HG_TRUE,

    auto margo_config = fmt::format(

            R"({{ "use_progress_thread" : true, "rpc_thread_count" : {} }})",

            gkfs::config::rpc::daemon_handler_xstreams);

    struct margo_init_info args = {nullptr};

    args.json_config = margo_config.c_str();

    args.hg_init_info = &hg_options;

    auto* mid = margo_init_ext(GKFS_DATA->bind_addr().c_str(), MARGO_SERVER_MODE, &args);

    if(mid == MARGO_INSTANCE_NULL) {

        throw runtime_error("Failed to initialize the Margo RPC server");

    }