invalid_in_addr_arpa 1431 core/ngx_resolver.c goto invalid_in_addr_arpa; invalid_in_addr_arpa 1442 core/ngx_resolver.c goto invalid_in_addr_arpa; invalid_in_addr_arpa 1450 core/ngx_resolver.c goto invalid_in_addr_arpa; invalid_in_addr_arpa 1577 core/ngx_resolver.c invalid_in_addr_arpa: