Métrica genérica mysql.status

É útil para podermos pegar quaisquer outras métricas do mysql em que
não precisamos fazer nenhuma conta *antes* de retonar o valor final
mysql.connections now receives username as parameters

The return value is the sum of all connections of the desired users
Merge pull request #4 from sievetech/feature/mysql.connection-per-user

mysql.connections now receives username as parameters
Merge pull request #3 from sievetech/feature/mysql.status-metric

Métrica genérica mysql.status