Issue #1354606, Make sure COUNT option without UNTIL date can be handled correctly by repeating date computations.

Issue #1179715, Switch drupal_array_get_nested_value() to use 'values' instead of 'input', where it makes sense, and simplify some of this code.

Issue #1179715, Create a helper function for testing hidden/disabled dates and test each date element and validator to skip processing in that case.

Issue #1179715, When hidden by #access=FALSE, repeating date fields were getting removed and not replaced.

Issue #1178716 by das-peter and KarenS, Tweak the date repeat widget to identify empty input when used on nodes with translation.

Issue #1216878, Re-introduce 'repeat' as a field setting rather than a widget type so people can't try to switch back and forth between repeating and non-repeating dates. Eliminate repeat widgets.

Issue #1234140 by arlinsundbulte, Change terminology in user-facing text from 'From/To Date' to 'Start/End Date'.

Issue #1209408 Make sure date_repeat_calc() returns empty array for FREQ=NONE and INTERVAL=0, also add a test for that.

Rework date repeat to use custom multiple values handling, we can't have multiple repeating date elements or everything breaks.