* First try IPv6 support... based on HPIM-DM IPv6 commit

* fix membership removal of interface (IGMP/MLD)

* Add support for unicast and multicast VRFs && remove some commented code && IGMP/MLD snake case global variables

Bump setup-python from v1 to v2

Allow enabling/disabling StateRefresh on previously disabled/enabled PIM-DM interfaces without having to remove them

Pim dm implementation

react to new neighbors (resend state refresh msg/clear prune limit timer <- based on downstream/upstream neighbor) & fix originator logger & remove dead code

fix loggers (using LoggerAdapter) & added join_prune_logger in Downstream/Upstream prune state machine & added originator_logger & fix downstream/upstream state machines

fix AssertCancel message (metric) & protocol information defined before initializing sockets & use of logs for tests & routing information stored in a different way (in Kernel) & fix some state machines & fix unicast routing updates & fix delete of tree information

fix Hello&Neighbor (timers and deadlocks) & check olist of all trees when interface changes number of neighbors & packet reception handled inside of interfaces' classes (instead of methods in separate files) & fix send of state refresh through non-root interfaces (if assert loser dont check prune and assert state)

IGMP efficient packet reception (via BPF) & StateRefresh/Originator state machine & socket to recv (S,G) data packets (also with BPF) & fix some state machine errors