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Description
The latest official spec of the config file format supports adding CalDAV and CardDAV setup parameters, so that a client can automatically configure the calendard and address book sync.
This adds the server URLs for the major ISPs that provide CalDAV and CardDAV services for their freemail users.
Note: In order to add it to the configuration, all email users of the ISP should have access to these features. We should only add it, if most of the users of that ISP have access to the CalDAV and CardDAV services.