Changed a few things on the way, removing the log process
# Conflicts:
# Duplicati/Library/Main/Controller.cs
# Duplicati/Library/Main/Database/ExtensionMethods.cs
# Duplicati/Library/Main/Database/LocalBackupDatabase.cs
# Duplicati/Library/Main/Duplicati.Library.Main.csproj
# Duplicati/Library/Main/Operation/BackupHandler.cs
# Duplicati/Library/Main/Operation/FilelistProcessor.cs
# Duplicati/Library/Main/Operation/PurgeBrokenFilesHandler.cs
# Duplicati/Library/Main/Operation/TestFilterHandler.cs
# Duplicati/Library/Main/Options.cs
# Duplicati/Library/Main/ResultClasses.cs
# Duplicati/UnitTest/BasicSetupHelper.cs
"IsFSCaseSensitive" used to call GetEnvironmentVariable() every time it
was accessed, which unnecessarily slows down the file counting procedure.
Caching the value of this environment variable speeds up things quite a
bit.
Change the logic for how the log data is included. It is now added as log lines _after_ the normal messages.
Added support for limiting the number of log lines sent.
Added support for setting the log levels on the modules.
Added support for setting a log filter on the modules.
Added support for sending log data as JSON from the http module.
While this does not affect any behavior, it more accurately describes
the accessibility. Since abstract classes can only be instantiated by
an instance of a derived type, the constructors should at most have
protected access.
Added support for the new keystone v3 API, the old v2.0 APIs are still
available, the v3 can be selected with a version option.
Only password login is implemented here for API v3, so token login is
still missing.
This class extends HttpClient and uses an OAuthHttpMessageHandler under the covers to automatically authenticate requests.
Additionally, it automatically respects the global HttpContextSettings for overall timeout, read/write timeout, and SSL certificate validation.
(BufferRequests isn't currently handled, as HttpClient doesn't seem to easily expose that flag, and as of .NET 4.5, seems to not buffer by default.)
Rename 'DefaultExclude' to 'DefaultExcludes' (and the same for 'DefaultInclude').
Rename 'TemporaryFolders' to 'TemporaryFiles' to align with other groups ('CacheFiles', 'SystemFiles', etc.)
Added some more shorter aliases for groups, 'Sys', 'Tmp', etc.
For SharePoint, this means instead of giving the site ID as a parameter (and a relative path as the backup URL), the full URL to the folder in SharePoint (e.g., 'sharepoint://{tenant}.sharepoint.com/{PathToSite}/{DocumentBase}/{subfolder}') can be given, and the site ID will be looked up.
(This should match the existing SharePoint backend, including the convention of using '//' to indicate the document root, though I can't explicitly test that since the SharePoint sites I have access to require 2FA, which the old backend doesn't support.)
I've tested both explicit ID and site path methods of specifying the destination, and they appear to be working.
For Office 365 groups, it now supports looking up a group by its email address.
