fmt_large_community
const char *fmt_large_community(uint32_t, uint32_t, uint32_t);
fmt_large_community(c.data1, c.data2, c.data3));
printf("%s", fmt_large_community(a, l1, l2));
fmt_large_community(c.data1, c.data2, c.data3));
json_do_string("community", fmt_large_community(a, l1, l2));