Sudo logging should also check the sudoers.d directory

[nathanielcutajar]

Currently the script only checks the sudoers file but in the file itself it states:

Please consider adding local content in /etc/sudoers.d/ instead of

directly modifying this file.

This means that we should instead create our our separate file with the following:
sudo nano /etc/sudoers.d/logging
Inside the file you'd write:
Defaults logfile=/var/log/sudo.log
Defaults log_input, log_output
sudo chmod 440 /etc/sudoers.d/logging

The script should check the sudoers.d directory and if need be go through all files in there and search for 'Defaults logfile'