Add more mongo connection examples

Description

In our docs page for the mongo client:
https://docs.mongodb.com/manual/reference/program/mongo/#syntax

We have a couple of examples for connecting with various options. It would be a good idea to add some more examples for more complex connection strings for example:

Kerberos Authentication

mongo 'mongodb://user%40EXAMPLE.COM@mongodb1.example.com.local:27017,mongodb2.example.com.local:27017,mongodb2.example.com.local:27017/?authSource=$external&authMechanism=GSSAPI&replicaSet=replA'

Special Character in the password

mongo 'mongodb:/user1:changeme%40123@mongodb1.example.com.local:27017,mongodb2.example.com.local:27017,mongodb2.example.com.local:27017/?authSource=admin&replicaSet=replA'

The same location in the docs also contains double quotes around all URI's the examples all work across platforms. But this can cause problems if there are (non-encoded) special characters in the URI. For *nix and Windows Powershell you should use single quotes and double quotes for the Windows CMD prompt. It might be a good idea to add this clarification also.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)