Mongo documentation & auth improvements

[WebFreak001]

Functionality-wise this changes a few little things:

• fixes mongodb unittest (distinct giving different order now)
• add tls as alias for the ssl parameter in parsing mongodb urls
• adds authenticatePassword and authenticateSSL methods to avoid issues with wrong usage of field members
• makes makeDigest pure to avoid calling it as member, expecting stuff to happen
• x509 authentication requires a username or forces it to be omitted completely if missing on certain driver specifications
• authentication mechanism generation now follows these strict rules:
  • (if set to none) if a certificate file is given & server is >= 2.6, use X509 authentication
  • (if set to none) otherwise if a digest is given, check server version
    • server version >= 3.0: use SCRAM-SHA-1
    • otherwise use MONGODB-CR
  • if the selected authentication mechanism isn't supported by the MongoDB server version now, throw a MongoAuthException

Otherwise fixes some documentation typos and adds a lot of documentation to the existing MongoClientSettings fields that were previously all undocumented. (which you need to set for the connectMongoDB call overload taking a settings object)

[WebFreak001]

working on partly redoing the authentication flow (and adding more exceptions for invalid configurations) done

[WebFreak001]

bump @s-ludwig