Merge branch 'tb/ban-strtok'

Mark strtok() and strtok_r() to be banned. * tb/ban-strtok: banned.h: mark `strtok()` and `strtok_r()` as banned t/helper/test-json-writer.c: avoid using `strtok()` t/helper/test-oidmap.c: avoid using `strtok()` t/helper/test-hashmap.c: avoid using `strtok()` string-list: introduce `string_list_setlen()` string-list: multi-delimiter `string_list_split_in_place()`