fix #17249 - clean up religion and denomination, replace religion=unitarian by religion=unitarian_universalist, warn about religion=catholic, add religion=tenrikyo and religion=confucian, add icons (https://commons.wikimedia.org/wiki/File:Tenrikyo_emblem.svg and https://commons.wikimedia.org/wiki/File:%E6%9C%A8%E9%90%B8_---_Confucian_wooden-clapper_bell.svg, modified, PD and CC0 licensed)