Global coap_clear_event_handler (struct coap_context_t *context): Use coap_register_event_handler() instead with NULL for hnd.
Global coap_encode_var_bytes (uint8_t *buf, unsigned int value): Use coap_encode_var_safe() instead.
Class coap_option: Use coap_optlist_t instead.
Global coap_option_clrb (coap_opt_filter_t filter, uint16_t type): Use coap_option_filter_unset() instead.
Global coap_option_getb (coap_opt_filter_t filter, uint16_t type): Use coap_option_filter_get() instead.
Global coap_option_setb (coap_opt_filter_t filter, uint16_t type): Use coap_option_filter_set() instead.
Global coap_resource_set_dirty (coap_resource_t *r, const coap_string_t *query): use coap_resource_notify_observers() instead.
Global coap_set_event_handler (struct coap_context_t *context, coap_event_handler_t hnd): Use coap_register_event_handler() instead.