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#269218 make sure the subform isn't set to be #programmed, so that radio/checkboxes set to required are properly validated
fixing a bug in the fix for #269218, also fixing #267466
changed the module to have #data_separation set to FALSE by default
changes since 1.1
* bugfix: obey #access for the #data_separation feature
* added another optional attribute #extra_form, which lets you easily add further form elements to the subform
changes since 1.0:
I've added two new settings for subforms.
* #data_separation, defaults to on: Separates the data in $_POST to avoid name conflicts
* #subform_after_build: This just adds #after_build functions for you to the subform. Useful for customizing subforms.