5aa54b8e62 Merge pull request #127 from ARMmbed/sync_with_mbedos
6fe78412d2 Follow Mbed OS coding style
2b708be451 trace group defiined for shared_rng
d4c2caca41 more error handling added for ctr and hmac
cace1e9c22 Added missing optimizations based on mbedtls/baremetal.h config
2cc7442ba5 Added new global rng, needed for MbedTLS optimisations
f861157576 Prepare for upcoming MbedTLS changes
git-subtree-dir: features/nanostack/coap-service
git-subtree-split: 5aa54b8e622ec2b44bdf323cc02bd1cfc5ffd904