string-list: note in docs that callers can specify sorting function
In commit 1959bf6430 (string_list API: document what "sorted" means, 2012-09-17), Documentation/technical/api-string-list.txt was updated to specify that strcmp() was used for sorting. In commit 8dd5afc926 (string-list: allow case-insensitive string list, 2013-01-07), a cmp member was added to struct string_list to allow callers to specify an alternative comparison function, but api-string-list.txt was not updated. In commit 4f665f2cf3 (string-list.h: move documentation from Documentation/api/ into header, 2017-09-26), the now out-dated api-string-list.txt documentation was moved into string-list.h. Update the docs to reflect the configurability of sorting. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>