1 - sorter: broken memory management in radix sort (can be bypassed with Sorter.Debug=32)
2 - ipaccess: support IPv6
3 - transactions: Unit tests
4 - Maint: git push --tags
7 - computing statistics of columns via the table_start_callback/table_end_callback.
8 - unsupported: (dynamic) alignment of cells which is computed in table_end