Mysql rrdtool gets NaN for mysql DB

Turns out that the default installation of MariaDB sets the root user as identified by SOCKET and so
the ‘root’@‘password’ formulation in the script and the cnf file cannot work.

A separate ADMIN user needs to be created per

" ```
CREATE USER admin@localhost IDENTIFIED BY ‘password’;
GRANT ALL ON *.* TO admin@localhost WITH GRANT OPTION;

((note that the asterisks needed an escape to be displayed, which you’d not want in the actual cmd))
This allows librenms to access the DB using ‘admin’@‘localhost’ in place of root.

Using the new “admin” user works.

Data is coming through now.