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
options.emplace_back(name, value);
                if ((pos = name.rfind('.')) != std::string::npos && prefix.length() <= pos) {
                    sections.emplace_back(SectionInfo{name.substr(0, pos), filepath, linenr});
                }
            } else {
                error = strprintf("parse error on line %i: %s", linenr, str);
                if (str.size() >= 2 && str.substr(0, 2) == "no") {
                    error += strprintf(", if you intended to specify a negated option, use %s=1 instead", str);
                }
                return false;
            }
        }
        ++linenr;
    }
    return true;
}
bool IsConfSupported(KeyInfo& key, std::string& error) {
    if (key.name == "conf") {
        error = "conf cannot be set in the configuration file; use includeconf= if you want to include additional config files";
        return false;
    }
    if (key.name == "reindex") {
        
        
        LogPrintf("Warning: reindex=1 is set in the configuration file, which will significantly slow down startup. Consider removing or commenting out this option for better performance, unless there is currently a condition which makes rebuilding the indexes necessary\n");
        return true;
    }
    return true;
}
bool ArgsManager::ReadConfigStream(std::istream& stream, const std::string& filepath, std::string& error, bool ignore_invalid_keys)