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
}) {
        if (args.IsArgSet(port_option)) {
            const std::string port = args.GetArg(port_option, "");
            uint16_t n;
            if (!ParseUInt16(port, &n) || n == 0) {
                return InitError(InvalidPortErrMsg(port_option, port));
            }
        }
    }
    for (const std::string port_option : {
        "-i2psam",
        "-onion",
        "-proxy",
        "-rpcbind",
        "-torcontrol",
        "-whitebind",
        "-zmqpubhashblock",
        "-zmqpubhashtx",
        "-zmqpubrawblock",
        "-zmqpubrawtx",
        "-zmqpubsequence",
    }) {
        for (const std::string& socket_addr : args.GetArgs(port_option)) {
            std::string host_out;
            uint16_t port_out{0};
            if (!SplitHostPort(socket_addr, port_out, host_out)) {
                return InitError(InvalidPortErrMsg(port_option, socket_addr));
            }
        }
    }