typedef int sort_t (const void *, const void *);
sort_t *mutt_get_sort_func (int);
-void mutt_clear_threads (CONTEXT *);
void mutt_sort_headers (CONTEXT *, int);
-void mutt_sort_threads (CONTEXT *, int);
int mutt_select_sort (int);
-THREAD *mutt_sort_subthreads (THREAD *, int);
WHERE short BrowserSort INITVAL (SORT_SUBJECT);
WHERE short Sort INITVAL (SORT_DATE);