better token handling return 200 if data-sink is empty
better token handling
return 200 if data-sink is empty

gebart/libcoap,PolymorhicCode/libcoap,authmillenon/libcoap,pabigot/libcoap,joaopedrotaveira/libcoap,fredericgermain/libcoap,pabigot/libcoap,RIOT-OS/libcoap,nmacs/libcoap,authmillenon/libcoap,sgso/libcoap,OlegHahm/libcoap,joaopedrotaveira/libcoap,authmillenon/libcoap,nmacs/libcoap,fredericgermain/libcoap,alexaring/libcoap,thecodemaiden/libcoap-fork,alexaring/libcoap,OlegHahm/libcoap,fredericgermain/libcoap,sgso/libcoap,markushx/libcoap,alexaring/libcoap,OlegHahm/libcoap,joaopedrotaveira/libcoap,gebart/libcoap,sgso/libcoap,gebart/libcoap,nmacs/libcoap,markushx/libcoap,thecodemaiden/libcoap-fork,RIOT-OS/libcoap,markushx/libcoap,pabigot/libcoap