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Kevin J. McCarthy authored
%N in $sidebar_format and "new"in $sidebar_sort_method actually use the unread message count. Update the documentation to mention that. Add an "unread" method to $sidebar_sort_method, but preserve "new" for compatibility. Change the SORT_COUNT_NEW constant to SORT_UNREAD, so the code is also consistent with the meaning. Thanks to cri for reporting the problem and suggesting where to fix it in the code.
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