Merge branch 'master-3.0' into dist/3.0/focal

Author: sorah

debian/Dockerfile.bionic

@@ -7,8 +7,7 @@ ARG BUILDDATE=99999999
 RUN sed -i -e 's|archive\.ubuntu\.com/ubuntu|ap-northeast-1.ec2.archive.ubuntu.com/ubuntu|g' /etc/apt/sources.list
 # Allow use of debhelper-compat 12 in backport
 # https://help.ubuntu.com/community/UbuntuBackports
-RUN /bin/echo -e "Package: debhelper\nPin: release a=bionic-backports\nPin-Priority: 500\n" | tee -a /etc/apt/preferences
-RUN /bin/echo -e "Package: dwz\nPin: release a=bionic-backports\nPin-Priority: 500\n" | tee -a /etc/apt/preferences
+RUN /bin/echo -e "Package: debhelper libdebhelper-perl dh-autoreconf dwz\nPin: release a=bionic-backports\nPin-Priority: 500\n\n" | tee -a /etc/apt/preferences
 
 ENV DEBIAN_FRONTEND=noninteractive
 RUN mkdir -p /build \