Fixes #975

This lifts batman-adv and alfred to version 2016.4.

Mesh-wide multicast requests are answered with a random delay of up to 10s.

gluon-client-bridge, gluon-mesh-batman-adv-core: switch roles of br-client and local-node interfaces

MAC and IP addresses are switched. This makes the gluon-client-bridge
package more useful for different routing protocols that don't need a
unique address on the client bridge.

As a side effect, gluon-radvd is now using the next-node address, which had
been considered before, but was dismissed to avoid having gluon-radvd
depend on gluon-next-node and gluon-mesh-batman-adv. This will be useful
for announcing default routes via gluon-radvd.

One downside is that this introduces a minor dependency on batman-adv in
gluon-respondd: the hotplug script that checked for the client interface
before will now check for local-node. This doesn't really matter: for mesh
protocols without a local-node interface, the check will do nothing (which
makes sense, as there is no interface to bind to for mesh-wide respondd).

The next-node interface may be useful with IPv4 only or even just a MAC
address. This prepares merging gluon-next-node into gluon-batman-adv-core.

Because we unconditionally appended `-i br-client` to the command line of
respondd, it wasn't restarted when br-client changed state. Now, we use a
jsonfilter expression on the network.interface dump data, similar to how the
other interface names are generated, and only add the interface to the argument
list if it is up.

* use tabs instead of spaces
* use jsonfilter for speed

The  assignment of the gpio_count and reg_base in ath79_gpio_output_select
takes care that only supported platforms can use ath79_gpio_output_select.
But the rebase of the patches after the last OpenWrt base update
accidentally added an extra check for the SoC which was missing support
soc_is_qca955x().

Boots on QCA955X devices which were using ath79_gpio_output_select stopped
with

    Kernel bug detected[#1]:
    [...]
    Call Trace:
    [<803e6174>] ath79_gpio_output_select+0x30/0xe8
    [<803ed590>] om5p_acv2_setup+0x24/0x200
    [<803e4dc0>] ath79_setup+0x28/0x38
    [<80069ac8>] do_one_initcall+0x148/0x1ec
    [<803e2cc4>] kernel_init_freeable+0x150/0x208
    [<80065218>] kernel_init+0x10/0x114
    [<80060878>] ret_from_kernel_thread+0x14/0x1c

Fixes: a22c1d56 ("Update OpenWrt base")
Signed-off-by: Sven Eckelmann <sven@narfation.org>

Fixes #941

Fixes: 212c38f0 "ar71xx: add model detection for UBNT Rocket Ti"

Some (possibly broken) bootloaders incorrectly initialize the at8033 phy.
This breaks auto-negotation on these SGMII devices. The mode has therefore
to be set back in to a valid configuration by Linux.

Fixes #911

The interfaces were accidentially switched when the CPE210 was separated
from the CPE510 code.