Add support for specifying an [SSL cert to use when connecting to Mongo](https://mongodb.github.io/mongo-csharp-driver/2.10/reference/driver/ssl/). Perhaps more broadly allow configuration of [MongoClientSettings](https://mongodb.github.io/mongo-csharp-driver/2.10/apidocs/html/T_MongoDB_Driver_MongoClientSettings.htm) or allow the application to create the MongoClient instance via a callback method.
Add support for specifying an SSL cert to use when connecting to Mongo.
Perhaps more broadly allow configuration of MongoClientSettings or allow the application to create the MongoClient instance via a callback method.