[SQUASH ME] unittests: netdev: Fix signedness problem
[WIP] start implementation of send
[SQUASH ME] netdev: make netdev_hlist_t packed for pktbuf
[SQUASH ME] netdev_base: appending makes no sense here => prepend
[SQUASH ME] tests.netdev: fix for prepending
Merge branch 'net-dev-base' into 6lowpan-fix-major