replaced CoAP option Token by new encoding
replaced CoAP option Token by new encoding

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