New data_type coap_time_diff_t and functions coap_time_lt(), coap_time_le() for time stamps with wrapping
New data_type coap_time_diff_t and functions coap_time_lt(), coap_time_le()
for time stamps with wrapping

PolymorhicCode/libcoap,sgso/libcoap,gebart/libcoap,authmillenon/libcoap,gebart/libcoap,fredericgermain/libcoap,fredericgermain/libcoap,thecodemaiden/libcoap-fork,authmillenon/libcoap,alexaring/libcoap,authmillenon/libcoap,RIOT-OS/libcoap,nmacs/libcoap,alexaring/libcoap,sgso/libcoap,nmacs/libcoap,thecodemaiden/libcoap-fork,sgso/libcoap,alexaring/libcoap,fredericgermain/libcoap,gebart/libcoap,RIOT-OS/libcoap,nmacs/libcoap