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
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    try {
        fs::remove(GetAuthCookieFile());
    } catch (const fs::filesystem_error& e) {
        LogPrintf("%s: Unable to remove random auth cookie file: %s\n", __func__, fsbridge::get_filesystem_error_message(e));
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}
std::vector<UniValue> JSONRPCProcessBatchReply(const UniValue& in)
{
    if (!in.isArray()) {
        throw std::runtime_error("Batch must be an array");
    }
    const size_t num {in.size()};
    std::vector<UniValue> batch(num);
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        }
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}
void JSONRPCRequest::parse(const UniValue& valRequest)