Common connection settings
Connection properties common to all sources.

General
The settings specific to each source come first: keys, addresses, reconnection. They are followed by the settings common to all sources:
- News - download news.
- Update securities - update securities when connected.
- Continue - continue downloading from the last downloaded date.
- Work interval - operation interval.
- Data directory - the directory with data where the final files in StockSharp format will be saved.
- Format - data format: BIN/CSV.
- Max. errors - the maximum number of errors after which the task will be stopped. The default is 0, which means ignoring the number of errors.
- Header - title of the task.
- Working time - the work schedule of the task.
- Validation - what to do with data that has not passed validation: nothing, delete it or stop the subscription.
Remotely
- Enabled - control the task remotely.
- Notification - the channel to which notifications about the task arrive.
- Logging level - which task messages to send to the channel.