Update gosu to 1.16

Change ENV to ARG
Add matchstring line

data/Dockerfiles/dovecot/Dockerfile

@@ -3,8 +3,10 @@ LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
 ARG DEBIAN_FRONTEND=noninteractive
 ARG DOVECOT=2.3.19.1
+# renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced
+ARG GOSU_VERSION=1.16
 ENV LC_ALL C
-ENV GOSU_VERSION 1.14
+
 
 # Add groups and users before installing Dovecot to not break compatibility
 RUN groupadd -g 5000 vmail \

data/Dockerfiles/sogo/Dockerfile

@@ -3,8 +3,9 @@ LABEL maintainer "Andre Peters <andre.peters@servercow.de>"
 
 ARG DEBIAN_FRONTEND=noninteractive
 ARG SOGO_DEBIAN_REPOSITORY=http://packages.sogo.nu/nightly/5/debian/
+# renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced
+ARG GOSU_VERSION=1.16
 ENV LC_ALL C
-ENV GOSU_VERSION 1.14
 
 # Prerequisites
 RUN echo "Building from repository $SOGO_DEBIAN_REPOSITORY" \

data/Dockerfiles/solr/Dockerfile

@@ -2,7 +2,8 @@ FROM solr:7.7-slim
 
 USER root
 
-ENV GOSU_VERSION 1.11
+# renovate: datasource=github-releases depName=tianon/gosu versioning=semver-coerced
+ARG GOSU_VERSION=1.16
 
 COPY solr.sh /
 COPY solr-config-7.7.0.xml /