Request: PostgresQL plugin

[stayallive]

I would like to monitor my PostgresQL servers like you can monitor MySQL.

Inspirations:

• https://github.com/DataDog/integrations-core/tree/master/postgres
• http://cavaliercoder.com/libzbxpgsql/
• https://docs.observium.org/apps/#postgresql

[ghost]

That would be fantastic.