use the maintanance account on debian system

mysqltuner.pl

@@ -292,6 +292,14 @@ sub mysql_setup {
 			badprint "Attempted to use login credentials from Plesk, but they failed.\n";
 			exit 0;
 		}
+	} elsif ( -r "/etc/mysql/debian.cnf" and $doremote == 0 ){
+		# It's a debian system, use the maintenance account
+		$mysqllogin = "-u `awk '\$1 ~ /user/ {print \$3}' /etc/mysql/debian.cnf | head -n 1` -p`awk '\$1 ~ /password/ {print \$3}' /etc/mysql/debian.cnf | head -n 1`";
+		my $loginstatus = `mysqladmin ping $mysqllogin 2>&1`;
+		unless ($loginstatus =~ /mysqld is alive/) {
+			badprint "Attempted to use login credentials from debian maintenance account, but they failed.\n";
+			exit 0;
+		}
 	} else {
 		# It's not Plesk, we should try a login
 		my $loginstatus = `mysqladmin $remotestring ping 2>&1`;