Hood selection methods should never return a default hood because this would require further checks wheter we got a default hood or a real hood in a result. The default hood should be returned in a seperate method. This change implements this method and simplifies the other hood selection methods.

Signed-off-by: Clemens John <clemens.john@floh1111.de>

Remove code that reconfigures hoods when a mesh router is moved from one hood to another without fixing its position manually. This code has side effects that occur if a batman advanced gateway fails

Signed-off-by: Clemens John <clemens.john@floh1111.de>