mac80211: merge AP VLAN / WDS related fixes

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@36699 3c298f89-4303-0410-b956-a3cf2f4a3e73
AA: allow ipv6 policy routing rules to select output traffic

git-svn-id: svn://svn.openwrt.org/openwrt@36700 3c298f89-4303-0410-b956-a3cf2f4a3e73
AA: backport r34389 to fix grub2 compilation

git-svn-id: svn://svn.openwrt.org/openwrt@36701 3c298f89-4303-0410-b956-a3cf2f4a3e73
6relayd: fix a lease-timing issue with stateful DHCPv6

git-svn-id: svn://svn.openwrt.org/openwrt@36702 3c298f89-4303-0410-b956-a3cf2f4a3e73
firewall3: update to git head

  - fixes linking issues with some toolchains

git-svn-id: svn://svn.openwrt.org/openwrt@36703 3c298f89-4303-0410-b956-a3cf2f4a3e73