Revert MIRROR switch, causing issues with apt-pinning

ngcp-services-pro depends on linux-headers-3.2.0-4-all,
which depends on linux-headers-3.2.0-4-all-amd64,
which depends on linux-headers-3.2.0-4-amd64.

linux-headers-3.2.0-4-amd64 is installed already in version
3.2.46-1+deb7u1 on our installation, being the current version
from security.debian.org. Because this package depends on all the
other packages being in version 3.2.46-1+deb7u1 as well this
fails due to our apt-pinning. Our apt-pinning considers
security.debian.org to be at it default pinning level 500 whereas
deb.sipwise.com is pinned to 990.  This results in package
dependencies that can't be resolved by using packages from
security.debian.org.

We have to think further regarding the wanted behaviour before we
actually make that MIRROR switch. :(

deployment.sh

@@ -778,10 +778,6 @@ fi
 # otherwise e2fsck fails with "need terminal for interactive repairs"
 echo FSCK=no >>/etc/debootstrap/config
 
-# otherwise we can't use packages with missing key http://deb.sipwise.com/autobuild/680FBA8A.asc
-# from our own $MIRROR - note: this could need some love...
-echo "DPKG_OPTIONS='-o APT::Get::AllowUnauthenticated=true -o aptitude::Cmdline::ignore-trust-violations=yes'" >> /etc/debootstrap/config
-
 # package selection
 cat > /etc/debootstrap/packages << EOF
 # addons: packages which d-i installs but debootstrap doesn't
@@ -845,7 +841,7 @@ case "$DEBIAN_RELEASE" in
     MIRROR='http://archive.debian.org/debian/'
     ;;
   *)
-    MIRROR='http://deb.sipwise.com/debian/'
+    MIRROR='http://debian.inode.at/debian/'
     ;;
 esac