mesh: use new mesh_acess_incoming_pdu_t for unsegmented access messages in lower + upper transport

mesh: remove app-key index from mesh-network-t

mesh: wrap unsegmented access message into mesh_message_pdu_t before passing to access layer

mesh: store appkey_index in mesh_message_t for outgoing unsegmented access messages

mesh: remove access acknowledgement data from network_pdu_t

mesh: use mesh_message_t for unsegmented access messages

mesh: send unsegmented mesh_message_pdu_t in lower transport

mesh: flatten incoming mesh_message_pdu_t in upper transport

mesh: assert mesh_upper_transport_process_segmented_message_done not called for unsupported control message

MISRAC2012-Rule-14.4_d: use while(true) instead of while(1)

ignore memcpy return value (always returns first parameter)

mesh: log destination address for send (un)segmented access message

mesh: assert ack_opcode is set for access messages

mesh: drop access message if appkey not available in upper transport

mesh: print seq number for outgoing upper transport messages

mesh: pop upper transport pdu after testing lower transport if it can be sent

mesh: set sequence number / seq auth in upper transport after reserving lower transport slot

mesh: check if lower transport can accept pdu for a given dest, reserve slot, queue control messages as well

mesh: fix compile without asserts

mesh: add flags to mesh_transport, use MESH_TRANSPORT_FLAG_RESERVED for segmented access messages

mesh: unsegmented access message gets seq number in upper transport

mesh: set network pdu sequence number only in lower transport

mesh: print pdu address in upper transport

mesh: fix warnings without asserts

mesh/upper_transport: use queue for outgoing access messages