kernel: describe bridge patch "no EAP forward"

It was initially added in r25095 by nbd.

SVN-Revision: 46823

target/linux/generic/patches-3.18/640-bridge_no_eap_forward.patch

@@ -1,3 +1,11 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: no EAP forward
+
+When bridging, do not forward EAP frames to other ports, only deliver
+them locally.
+Fixes WPA authentication issues with multiples APs that are connected to
+each other via bridges.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -97,7 +97,11 @@ int br_handle_frame_finish(struct sk_buf

target/linux/generic/patches-4.0/640-bridge_no_eap_forward.patch

@@ -1,3 +1,11 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: no EAP forward
+
+When bridging, do not forward EAP frames to other ports, only deliver
+them locally.
+Fixes WPA authentication issues with multiples APs that are connected to
+each other via bridges.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -153,7 +153,11 @@ int br_handle_frame_finish(struct sk_buf

target/linux/generic/patches-4.1/640-bridge_no_eap_forward.patch

@@ -1,3 +1,11 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: no EAP forward
+
+When bridging, do not forward EAP frames to other ports, only deliver
+them locally.
+Fixes WPA authentication issues with multiples APs that are connected to
+each other via bridges.
+---
 --- a/net/bridge/br_input.c
 +++ b/net/bridge/br_input.c
 @@ -162,7 +162,11 @@ int br_handle_frame_finish(struct sock *