kernel: add a patch to allow disabling processing of the netfilter "filter"...

kernel: add a patch to allow disabling processing of the netfilter "filter" table for established connection packets

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

Backport of r42046

git-svn-id: svn://svn.openwrt.org/openwrt/branches/barrier_breaker@42050 3c298f89-4303-0410-b956-a3cf2f4a3e73