The logic is currently that the template is scanned for potential values, and those that are found are reported in the extra tag for the JSON.
A bit clumsy, but allows the user to choose specific fields to include in the reported data.
Integrated changes to support log-lines and to have a common shared module for reporters
# Conflicts:
# Duplicati/Library/Modules/Builtin/Duplicati.Library.Modules.Builtin.csproj
# Duplicati/Library/Modules/Builtin/RunScript.cs
# Duplicati/Library/Modules/Builtin/SendHttpMessage.cs
# Duplicati/Library/Modules/Builtin/SendJabberMessage.cs
# Duplicati/Library/Modules/Builtin/SendMail.cs