* Improved Windows Eventlog support.
Added support for logging to a different log with a Log:Source format.
Backwards compatible by treating "Source" as "Application:Source", where "Source" is default "Duplicati".
* Changed default log-level for eventlog to `Warning`.
This fixes#5770
* Fixed issue where checking for event log would crash the process.
Changed default log to `Duplicati` (was `Application`).
New default source names for service, agent and server.
* Reverted windows log-level back to information, now that there is a separate log for it
* Using "Duplicati 2" as the log name because "Duplicati" may be registered as a source name.
* Attempt to stop service before uninstalling
* Added additional diagnostics messages
* Fixed bug with starting the agent as a service
* Default to not use WindowsService for Agent as it requires permissions to create the event log
* Reduced log message levels for ongoing communication in agent
* Prevent double-logging from agent into Windows EventLog
* Made the agent log under a separate log source name
