docs: TODO tags update
tests: remove AF_UNIX socket after the test
ipdb: lock the interface during the __sub__()
ipdb: join the monitoring thread on exit()
iproute: refactoring

 * removed: addr_add(), addr_del(), route_add(), route_del() — use addr() and route()
 * name variables in a consistent way, use `index` instead of `dev` or `interface`
 * re-work get_links()
examples: interface creation

 * bond
 * dummy
 * bridge
 * vlan