The `make install` script, which most users would run via `sudo` to install into `/usr/local`, will use the current umask of the root user when creating certain files and directories. If one uses a restrictive umask by default (e.g. `umask 077`), this means that only the root user will be able to use the full Bitcoin package.

**Expected behavior**

The install script creates all directories and files, including man pages, etc., with permissions `644` / `755`.

**Actual behavior**

Certain folders are created using the default umask, e.g.:

- /usr/local/share/man/man1/
- /usr/local/lib/pkgconfig/
- [...]

This means that only root can access files in these folders and other users won't be able to read the man pages (for example).

**To reproduce**

```bash
$ ./autogen.sh
$ make
$ sudo -iu root
% umask 077
% make install
```

**System information**

OS: Linux
bitcoind version: HEAD
}
            const uint256 asmap_version = SerializeHash(asmap);
            LogPrintf("Using asmap version %s for IP bucketing\n", asmap_version.ToString());
        } else {
            LogPrintf("Using 16 prefix for IP bucketing\n");
        }
        
        assert(!node.netgroupman);
        node.netgroupman = std::make_unique<NetGroupManager>(std::move(asmap));
        
        assert(!node.addrman);
        uiInterface.InitMessage(_("Loading P2P addresses…").translated);
        if (const auto error{LoadAddrman(*node.netgroupman, args, node.addrman)}) {
            return InitError(*error);
        }
    }
    assert(!node.banman);
    node.banman = std::make_unique<BanMan>(gArgs.GetDataDirNet()  "banlist", &uiInterface, args.GetIntArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
    assert(!node.connman);
    node.connman = std::make_unique<CConnman>(GetRand<uint64_t>(),
                                              GetRand<uint64_t>(),
                                              *node.addrman, *node.netgroupman, args.GetBoolArg("-networkactive", true));
    assert(!node.fee_estimator);
     
     
    if (!ignores_incoming_txs) node.fee_estimator = std::make_unique<CBlockPolicyEstimator>(FeeestPath(args));
     
    for (const std::string port_option : {
        "-port",
        "-rpcport",