From: Hangbin Liu
Date: Thu, 12 Jan 2017 21:19:37 +0800
> This is an IPv6 version of commit 24803f38a5c0 ("igmp: do not remove igmp
> souce list..."). In mld_del_delrec(), we will restore back all source filter
> info instead of flush them.
>
> Move mld_clear_delrec() from ipv6_mc_down() to ipv6
This is an IPv6 version of commit 24803f38a5c0 ("igmp: do not remove igmp
souce list..."). In mld_del_delrec(), we will restore back all source filter
info instead of flush them.
Move mld_clear_delrec() from ipv6_mc_down() to ipv6_mc_destroy_dev() since
we should not remove source list info when s
