* Fixed nullability warnings in `Utility.cs`
* Fixed a number of nullability issues and warnings
* More nullable fixes
* Fixed the overwrite issue
* Fixed additional nullability issues
* Removed additional nullability issues
* More nullability fixes and added some xmldoc
* Added more xmldocs and removed an unused argument
* Removed more warnings
Delay was caused by AWS library performing network queries when reading properties on the configuration object.
On top of this, the properties were read twice.
Unified reading+application of options between iDrive and AWS S3.