code cleanup for Contiki
code cleanup for Contiki

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