Start milestone 3

- Add functionality to query online sources (Keyservers, etc) for
  certificates.
- Use introducers to determine which UserIDs should be fetched from
  online soources. Check certifications before importing certifiactes
  into the local cert store.
- start docker image for local end-to-end testing.

docker/mta_provision/usr/bin/prepare.sh

@@ -0,0 +1,56 @@
+#!/usr/bin/bash
+
+BRANCH=$1
+
+## create domain
+echo "127.0.0.1 " $(hostname) > /etc/hosts
+echo "127.0.0.2 example.com" >> /etc/hosts
+
+## build milter
+if [ -f /opt/husk/mapped/husk ] ; then
+  HUSK_BIN=/opt/husk/mapped/husk
+else 
+  cd /opt/husk
+  git clone https://gitlab.com/husk-project/husk-milter.git
+  cd husk-milter
+  if [ "$BRANCH" != "" ] ; then
+    git checkout $BRANCH
+  fi
+  cargo build --release
+
+  HUSK_BIN=/opt/husk/husk-milter/target/release/husk
+fi
+
+## start rsyslogd
+/usr/sbin/rsyslogd -n -iNONE &
+
+## start postfix
+sudo postfix start 
+
+## start and prepare postgres
+DOMAINS="example.com"
+sudo /etc/init.d/postgresql start
+echo "create user hockeypuck;" | sudo -u postgres psql -d template1 -U postgres
+for domain in $DOMAINS ; do
+  DB_NAME=$(echo $domain | tr -d '.-')
+  echo "
+    create database hkp_$DB_NAME with owner 'hockeypuck';
+    GRANT ALL PRIVILEGES ON DATABASE hkp_$DB_NAME to hockeypuck;
+  " | sudo -u postgres psql -d template1 -U postgres
+done
+
+#
+# start hockeypuck
+#
+echo "start hockeypuck"
+for domain in $DOMAINS ; do
+  echo "  $domain..."
+  sudo -u hockeypuck hockeypuck --config /etc/hockeypuck.d/hockeypuck_$domain.conf 2>&1 > /tmp/hockeypuck_$domain.out &
+done
+
+## create sequoia_home
+bash /usr/bin/gen_sq_home.sh
+
+## start milter
+cd /opt/husk
+$HUSK_BIN config.toml &