Simplify token handling by having a state token for Block1 requests where the
top 16 bits are an incrementing request counter and the bottom 48 bits are the
base token.
Re-order struct coap_lg_crcv_t to reduce data space usage.
Track request method for Block2 requests.
Make coap_add_data_large_internal() a static function.
Make sure that lg_srcv is freed off when all PUT/POST data is in to
prevent next PUT/POST to same resource not getting correctly updated.
Jon Shallow
e43cf9369a