community-profiles: update berlin profile & remove berlin_pberg

these patches are used by the berlin-freifunk-community since 2014
- change ssid
  (https://github.com/freifunk-berlin/firmware/commit/563c955a19ea0db0bcbe6da1be0f50dd971961a3)
- remove obsolete olsr defaults
  (https://github.com/freifunk-berlin/firmware/commit/4558f8c88a99807388b3b1e315b440693b778a1d)
- use intern-chXX.freifunk.net as ssid scheme for adhoc
  (https://github.com/freifunk-berlin/firmware/commit/6ce8f590822bd31c37f247a8f006a8f2c5567b55)
- add mcast_rate
  (https://github.com/freifunk-berlin/firmware/commit/e90753ed0485d9c59a3af55efc8156e391ca848a)
  (https://github.com/freifunk-berlin/firmware/commit/01856773720b4755ee83080ba400b8489cf97416)
- add wifi_device and *_iface for 5GHz
  (https://github.com/freifunk-berlin/firmware/commit/5823e89a3d2d13bb47a2c9c7d33541588b9e64ab)
- remove owm_api and mapserver key from community profile
  (https://github.com/freifunk-berlin/firmware/commit/d4ee2e1bce4f04882af8cf28e62b97795959c31f)
- add two ipv6 nameservers
  (https://github.com/freifunk-berlin/firmware/commit/83df6ab77164a391f4536e32bc549a577d06af89)
- change default dhcp leasetime to 5 minutes
  (https://github.com/freifunk-berlin/firmware/commit/b38af129e0d4d4f5b6d1b1c23c57e6bec312de5f)
- remove non existent freifunk community profiles (Berlin)
  (https://github.com/freifunk-berlin/firmware/commit/6c49443bdef9905e71ad77b729d4cc95c5d66062)

Signed-off-by: Sven Roederer <freifunk@it-solutions.geroedel.de>