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
{
    return AbsPathForConfigVal(args.GetPathArg("-pid", BITCOIN_PID_FILENAME));
}
[[nodiscard]] static bool CreatePidFile(const ArgsManager& args)
{
    std::ofstream file{GetPidFile(args)};
    if (file) {
#ifdef WIN32
        tfm::format(file, "%d\n", GetCurrentProcessId());
#else
        tfm::format(file, "%d\n", getpid());
#endif
        return true;
    } else {
        return InitError(strprintf(_("Unable to create the PID file '%s': %s"), fs::PathToString(GetPidFile(args)), SysErrorString(errno)));
    }
}
#if HAVE_SYSTEM
static void ShutdownNotify(const ArgsManager& args)
{
    std::vector<std::thread> threads;
    for (const auto& cmd : args.GetArgs("-shutdownnotify")) {
        threads.emplace_back(runCommand, cmd);
    }
    for (auto& t : threads) {
        t.join();
    }
}
#endif
void Interrupt(NodeContext& node)