Further develop Mariadb security (#727)
Further develop Mariadb security (#727)

Secure database and allow only sudoers to access & perform db root functions
emoncms/emoncms,chaveiro/emoncms,chaveiro/emoncms,emoncms/emoncms,inverse/emoncms,inverse/emoncms,chaveiro/emoncms,emoncms/emoncms,emoncms/emoncms,inverse/emoncms,emoncms/emoncms,chaveiro/emoncms,inverse/emoncms