for configuration of a remote syslog server within expertmode.

move geo_default_site to site.conf and add some documentation

The link to the map can now be specified within site.conf.

backport from https://github.com/ffgtso/ffgt_packages-v2015.1/commit/3a0209c2c436ea1f253f011392580d57f91605d0

compatible with gluon v2016.1.x since Apr 28, 2016

within master and 2016.1.x since Apr 28, 2016

/lib/gluon/upgrade/510-autoupdater-wifi-fallback:
- network config updated

/usr/lib/lua/autoupdater-wifi-fallback/util.lua:
- return radio, ssid and bssid

/usr/sbin/autoupdater-wifi-fallback:
- check if /sys/kernel/debug/batman_adv/bat0/gateways is readable
- update switch_to_fallback_mode() for own script /usr/sbin/wpa_supplicant
- improve log messages

/usr/sbin/wpa_supplicant: NEW
- script for executing iw dev <devname> connect [-w] <SSID> [<freq in MHz>] [<bssid>] [key 0:abcde d:1:6162636465]
- use bssid to specify the ap

and write log messages

determine the update branch with 'autoupdater-wifi-fallback -b <branch>'

Luci module for gluon-autoupdater and ffho-autoupdater-wifi-fallback, based on
gluon-luci-autoupdater.

this is not needed for current gluon/master, but we are developing for v2016.1.x

Add ReadMe.md for:
- ffho-alfred-watchdog
- ffho-autoupdater
- ffho-autoupdater-wifi-fallback
- ffho-autoupdater-wifi-fallback-legacy
- ffho-banner
- ffho-config-mode-geo-location
- ffho-config-mode-mesh-vpn
- ffho-debug
- ffho-geo-location-altitude-delete
- ffho-respondd-config
- ffho-status-page
- ffho-txpower-fix
- ffho-wifi-blackout-workaround
- ffho-wifi-mesh-macfilter

Add incomplete ReadMe.md for:
- ffho-ebtables-net-rules
- ffho-node-tuning

Update:
- ffho-txpower-fix/Makefile
- ffho-wifi-blackout-workaround/files/etc/hotplug.d/iface/99-ath9k_disable_ani

this fixes https://github.com/freifunk-gluon/gluon/issues/703

ffho-openwrt-migration-tools: deleted
- obsolete and unused

ffho-geo-location-altitude-delete: renamed
- called ffho-upgrade-tools bevore
- currently unused but may usable for someone

- support current gluon version
- support nodes with dualband wifi

/etc/config/autoupdater-wifi-fallback
  - just provide a config example

/lib/gluon/upgrade/510-autoupdater-wifi-fallback
  - if ther is no config, copy enable state from autoupdater
  - there is no need for setting the wireless config here
  - set a cron job to execute the wifi-fallback 10 minutes after the autoupdater

/usr/lib/lua/autoupdater-wifi-fallback/util.lua
  - improve get_available_wifi_networks()
    - use iwinfo, so there is no need to use io.poppen()
    - match the SSID to someting containing "Freifunk" (case-insensitive)
  - removed unused functions
    - get_site_macs()
    - is_in_fallback_mode()
    - neighbours()
    - interfaces()
    - get_wifi_neighbours()

/usr/lib/micron.d/autoupdater-wifi-fallback removed
  - the cron job is now prepared by /lib/gluon/upgrade/510-autoupdater-wifi-fallback

/usr/sbin/autoupdater-wifi-fallback
  - don't get min_update_secs from the config, just declare it here
  - remove the debug output
  - parse_args()
    - add new arg -b for feature use
    - add error message
  - preflight_check()
    - do not exit, just return true or false
    - do not check the fastd socket, it exists if fastd is running and does not belong to an established connection
  - connectivity_check()
    - was called check_connectivity() bevore, renamed to be similar to preflight_check()
    - do not check your wifi neighbours, they may have no connection too
    - some little code improvements
  - switch_to_falback_mode(wifiNetwork, radio)
    - we need the radio, too, to connect to the wifiNetwork
    - delete all wifi-ifaces, we will restore them later, don't worry
    - setup config for fallback wifi-iface
    - iw dev <dev> connect -w <ssid>, is not working any more, so we install wpa-suplicant-mini
    - revert the wireless directly after connecting to the AP
  - revert_to_standard_mode()
    - the config is allready restored, so just reinitialize the network
  - is_in_fallback_mode()
    - deleted
    - there is no reason to check this here
  - again no need to check the fastd socket
  - improve unreachable_since, execute os.time() only one time
  - as already mentioned, we need the corresponding radio, to connect to wifiNetwork

ffho-autoupdater-wifi-fallback-legacy: new
  - migration package to migrate from old version to the new one
  - deletes the obsolete config after an upgrade

for details see https://github.com/freifunk-gluon/gluon/pull/693

announced is replaced by respondd, so we can delete /lib/gluon/announce/. we may add the corresponding respondd feature later.

gluon now uses respondd instead of announced, so we need to replace ffho-alfred-config with the corresponding respondd package

adding PROVIDES:=gluon-* to corresponding  ffho-package