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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    LOCK(cs_args);
    m_network = network;
}
bool ArgsManager::ParseParameters(int argc, const char* const argv[], std::string& error)
{
    LOCK(cs_args);
    m_settings.command_line_options.clear();
    for (int i = 1; i < argc; i++) {
        std::string key(argv[i]);
#ifdef MAC_OSX
        
        
        
        
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#endif
        if (key == "-") break; 
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        if (is_index != std::string::npos) {
            val = key.substr(is_index + 1);
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        }
#ifdef WIN32
        key = ToLower(key);