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
std::set<std::string> ArgsManager::GetUnsuitableSectionOnlyArgs() const
{
    std::set<std::string> unsuitables;
    LOCK(cs_args);
    
    if (m_network.empty()) return std::set<std::string> {};
    
    if (m_network == CBaseChainParams::MAIN) return std::set<std::string> {};
    for (const auto& arg : m_network_only_args) {
        if (OnlyHasDefaultSectionSetting(m_settings, m_network, SettingName(arg))) {
            unsuitables.insert(arg);
        }
    }
    return unsuitables;
}
std::list<SectionInfo> ArgsManager::GetUnrecognizedSections() const
{
    
    static const std::set<std::string> available_sections{
        CBaseChainParams::REGTEST,
        CBaseChainParams::SIGNET,
        CBaseChainParams::TESTNET,
        CBaseChainParams::MAIN
    };
    LOCK(cs_args);
    std::list<SectionInfo> unrecognized = m_config_sections;
    unrecognized.remove_if([](const SectionInfo& appeared){ return available_sections.find(appeared.m_name) != available_sections.end(); });
    return unrecognized;
}
void ArgsManager::SelectConfigNetwork(const std::string& network)