Man pages matching name free_lzss_pack_data in section 3alleg4:

free_lzss_pack_data.3alleg4.en	debian 10 / allegro4-doc
free_lzss_pack_data.3alleg4.en	debian 11 / allegro4-doc
free_lzss_pack_data.3alleg4.en	debian 12 / allegro4-doc