[Dovecot] Dovecot 2.3 from git for temp fixes

[ACME] Use -a switch (thanks to jas8522!)

data/Dockerfiles/acme/Dockerfile

@@ -4,30 +4,14 @@ LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
 RUN apk add --update --no-cache \
   bash \
+  acme-client \
   curl \
   openssl \
   bind-tools \
   jq \
-  libressl-dev \
-  libbsd-dev \
-  libseccomp-dev \
   mariadb-client \
-  tini \
-  make \
-  gcc \
-  libressl \
-  libc-dev \
   redis \
-  linux-headers \
-  ca-certificates \
-  && curl -s https://kristaps.bsd.lv/acme-client/snapshots/acme-client-portable.tgz | tar xfvz - \
-  && cd acme-client-* \
-  && sed -i 's/LE-SA-v1.1.1-August-1-2016.pdf/LE-SA-v1.2-November-15-2017.pdf/g' main.c \
-  && make \
-  && make install \
-  && cd .. \
-  && rm -rf acme-client-* \
-  && apk del libressl-dev libbsd-dev libseccomp-dev libc-dev linux-headers
+  tini
 
 COPY docker-entrypoint.sh /srv/docker-entrypoint.sh