capabilities: SORT

ok sort (subject) us-ascii all
* sort 9 10 1 14 3 5 11 6 15 2 7 12 13 8 4

ok sort (reverse subject) us-ascii all
* sort 4 8 2 7 12 13 15 6 3 5 11 14 1 9 10

ok sort (subject reverse size) us-ascii all
* sort 10 9 1 14 11 5 3 6 15 13 12 7 2 8 4
