* Rename confusingly named helpers for URL generation
* new name
* fix old call
* Revert "new name"
This reverts commit a6e9a488b62b9bc7c2800c402e432765a838cbc6.
* New name
Add a registry for datasync providers and an associated sync queue, to be used by
plugins that transfer data from pretix orders to external systems.
Additionally, provide a generic data mapping interface to be used in settings pages
of such plugins, to let users configure which information from pretix to fill into
which data fields of the external system.
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Co-authored-by: Raphael Michel <michel@rami.io>