gluon-config-mode-contact-info: provide enhancements for german, english and french translation to comply with DSGVO (#1394)

* do not allow to obligatorily require contact information
* add remark that the data is provided voluntarily
* mention how to delete the data
* be very clear about the fact that the data being entered is public and
  can be downloaded and processed by anyone.

This commit adds the ability to show information about the platform on
config-mode reboot.

based on package documentation, authored by T_X 
https://github.com/freifunk-gluon/gluon/blob/84a6f65f02d7e36a073ba2839712f0c0bb1dda10/package/gluon-ebtables-limit-arp/Makefile#L18-L39

fixes #1383

Make ubiquiti-rocket-m a separate device rather than a bullet-m alias to
enable USB support and allow adding devive-specific packages.

This commit adds support for the AVM Fritz!Box 4020 WiFi-router.

SoC:   Qualcomm Atheros QCA9561 (Dragonfly) 750MHz
RAM:   Winbond W971GG6KB-25
FLASH: Macronix MX25L12835F
WiFi:  QCA9561 b/g/n 3x3 450Mbit/s
USB:   1x USB 2.0
IN:    WPS button, WiFi button
OUT:   Power LED green, Internet LED green, WLAN LED green,
       LAN LED green, INFO LED green, INFO LED red
UART:  Header Next to Black metal shield
       Pinout is 3.3V - RX - TX - GND (Square Pad is 3.3V)
       The Serial setting is 115200-8-N-1.

Tested and working:
 - Ethernet (LAN + WAN)
 - WiFi (correct MAC)
 - Installation via EVA bootloader
 - OpenWRT sysupgrade
 - Buttons
 - LEDs

Not working:
 - USB port

Installation via EVA:
In the first seconds after Power is connected, the bootloader will
listen for FTP connections on 169.254.157.1 (Might also be 192.168.178.1). Firmware can be uploaded
like following:

  ftp> quote USER adam2
  ftp> quote PASS adam2
  ftp> binary
  ftp> debug
  ftp> passive
  ftp> quote MEDIA FLSH
  ftp> put openwrt-sysupgrade.bin mtd1

Note that this procedure might take up to two minutes. After transfer is
complete you need to powercycle the device to boot OpenWRT.

Signed-off-by: David Bauer <mail@david-bauer.net>

This commit adds information about:
- how cpu time is spent since boot in jiffies (1/100*sek) (cpu)
    - the value is summed for all cores, so in 10 seconds the
      summed values will increase by 4000, if the cpu has
      4 cores
- context switches since boot (ctxt)
- interrupt counters since boot (intr, softirq)
- forks since boot (processes)

    { "stat": {
       "cpu": {
         "user": 219403,
         "nice": 1714,
         "system": 75159,
         "idle": 2727739,
         "iowait": 2943,
         "irq": 0,
         "softirq": 571
       },
       "intr": 8426340,
       "ctxt": 50992590,
       "processes": 10549,
       "softirq": 5161884
    } }

0bf3b72c33d9 nat46: fixup PKG_MIRROR_HASH
23aa2e7b4afa nodogsplash2: Add NDS Restart Hook for Firewall (#369)
7ae81c8311ec cjdns: 20.1 -> 20.2
ff7b5da265e1 prince: version bump to v0.4
2f90fe406c58 miniupnpd: De-maintainering myself.
fdaa4cde3b2c bmx7: bump version
455a54207c84 batman-adv: upgrade package to latest release 2018.1
2e4937ea68f8 batctl: upgrade package to latest release 2018.1
a0eca40b0003 alfred: upgrade package to latest release 2018.1
015e5e99f2b6 bmx7: use configReaload on service reload
0ced8ec5a763 bmx7: keep bmx7 secret keys on sysupgrade
4bff0b3c65c5 cjdns: build fixes
7fc2fbdfc1b7 babeld: release 1.8.1
135bc605b4cf alfred: Support interface IDs with more than two digits
91e600e1cd9a bmx7: convert init script to use procd
86be0095b475 nodogsplash2: Add compatibility with mwan3 v2
17fccad969ea smcroute: Change download to HTTP
63cae8f571a6 bmx7: bump version

999bb66b20b0 kernel: add missing in6_dev_put_clear call to an ipv6 network patch
81573ea25924 kernel: bump kernel 4.4 to 4.4.129 for 17.01
afa887388766 gcc: gcc 6.3.0 fix comparison between pointer and integer

In multidomain setups, VXLAN is enabled by default, but can be disabled in
domain configs using the mesh/vxlan option. In single domain setups, the
mesh/vxlan option is mandatory.

The UCI option for legacy mode is removed.

Fixes #1364

Fixes: 8e5abf02 ("treewide: switch to ebtables-tiny")

Let's keep the default package selection to hardware support.

eed9d40133fe ar71xx: Ubiquiti Airmax M: add relocate-kernel to invalidate cache
23a638ebd1fd brcm47xx: backport upstream patches for Netgear WNR1000 V3

efb6ca189641 base-files: /lib/functions.sh: ignore errors in insert_modules
b5ba01a0d3f6 fstools: update to latest lede-17.01 branch
a9b607740273 kernel: bump kernel 4.4 to 4.4.126 for 17.01
09d95e44fc3d mbedtls: change libmbedcrypto.so soversion back to 0
4673a0bffc89 kernel: mtd: bcm47xxpart: improve handling TRX partition size

Also switch to the upstreamed version of "kernel: disable accept_ra by
default".

The local_node ifstatus must be checked for local-node, not client. While
we're at it, also clean up the syntax a bit.

batman-adv-specific parts are moved to a new package
gluon-status-page-mesh-batman-adv.

gluon-core, gluon-l3roamd: introduce script gluon-list-mesh-interfaces that lists all currently active mesh interfaces

gluon-status-page: reduce usage of absolute paths in cgi-bin scripts neighbours-nodeinfo and stations