prepare stable ci install script for buster

scripts/ci-aegir-stable-install-apt-debian10.sh

+#
+# Install Aegir debian packages located in the projects stable repository.
+#
+# This script is tuned for Debian 10 - Buster
+#
+
+
+sudo apt-get install --yes wget
+
+sudo wget -O /usr/share/keyrings/aegir-archive-keyring.gpg https://debian.aegirproject.org/aegir-archive-keyring.gpg
+echo "deb [signed-by=/usr/share/keyrings/aegir-archive-keyring.gpg] https://debian.aegirproject.org stable main" | sudo tee -a /etc/apt/sources.list.d/aegir-stable.list
+sudo apt-get update
+#echo "debconf debconf/frontend select Noninteractive" | debconf-set-selections
+
+
+sudo apt-get install --yes mariadb-server
+sudo /usr/bin/mysql -e "GRANT ALL ON *.* TO 'aegir_root'@'localhost' IDENTIFIED BY 'PASSWORD' WITH GRANT OPTION"
+
+
+debconf-set-selections <<EOF
+aegir3-hostmaster aegir/email string  aegir@example.com
+aegir3-hostmaster aegir/site  string  aegir.example.com
+postfix postfix/main_mailer_type select Local only
+
+EOF
+
+
+sudo DPKG_DEBUG=developer apt-get install --yes aegir3