Options to use CMD line options or ENV variables to connect to MongoDB instances

[ThangHuuVu]

Currently there is only one option to use the Connection String URI to connect to MongoDB instances. Because Connection String URI doesn't support tlsCAFile and tlsCertificateKeyFile, it wouldn't be possible to connect to MongoDB instances that requires these value in the connection string. It would be very nice if mongoaudit allows users to use Command line options or Environment Variables (like Mongo Drivers) instead.