Dockerfile updated

bsdmainutils added (needed for x86-images)
Switch Mail to build@hochstift.freifunk.net

docker/Dockerfile

@@ -5,11 +5,11 @@ RUN apt-get update && apt-get install -y \
     build-essential \
     git python wget gawk subversion p7zip-full unzip \
     faketime libfaketime libgmp-dev libmpfr-dev libmpc-dev \
-    zlib1g-dev ncurses-dev libssl-dev
+    zlib1g-dev ncurses-dev libssl-dev bsdmainutils
 
 RUN useradd -m build
 ENV HOME /home/build
-RUN sudo -Hu build git config --global user.name "docker-based build" ; sudo -Hu build git config --global user.email "build@paderborn.freifunk.net"
+RUN sudo -Hu build git config --global user.name "docker-based build" ; sudo -Hu build git config --global user.email "build@hochstift.freifunk.net"
 
 RUN mkdir /code
 WORKDIR /code