rpc: add error code in 'interface offload' msg.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabbad: return error code in 'interface offload'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: support error code in 'interface offload'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
rpc: add error code in 'thread' msg.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabbad: return error code in 'thread' cmd.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
rpc: return error code on 'thread modify'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabbad: return error code in 'thread modify' cmd.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: support error code in 'thread modify'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
rpc: add error code in 'thread capabilities' msg.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabbad: return error code in 'thread capabilities' cmd.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: support error code in 'thread capabilities'.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>