fix Ubuntu Xenial docker build environment (lock deimos for openssl to older version)
diff --git a/build/docker/ubuntu-xenial/Dockerfile b/build/docker/ubuntu-xenial/Dockerfile
index c69bec2..c745a59 100644
--- a/build/docker/ubuntu-xenial/Dockerfile
+++ b/build/docker/ubuntu-xenial/Dockerfile
@@ -115,10 +115,10 @@
mv libevent-master/deimos/* /usr/include/dmd/druntime/import/deimos/ && \
mv libevent-master/C/* /usr/include/dmd/druntime/import/C/ && \
rm -rf libevent-master
-RUN curl -sSL https://github.com/D-Programming-Deimos/openssl/archive/master.tar.gz| tar xz && \
- mv openssl-master/deimos/* /usr/include/dmd/druntime/import/deimos/ && \
- mv openssl-master/C/* /usr/include/dmd/druntime/import/C/ && \
- rm -rf openssl-master
+RUN curl -sSL https://github.com/D-Programming-Deimos/openssl/archive/v1.1.6+1.0.1g.tar.gz | tar xz && \
+ mv openssl-1.1.6-1.0.1g/deimos/* /usr/include/dmd/druntime/import/deimos/ && \
+ mv openssl-1.1.6-1.0.1g/C/* /usr/include/dmd/druntime/import/C/ && \
+ rm -rf openssl-1.1.6-1.0.1g
RUN apt-get install -y --no-install-recommends \
`# Dart dependencies` \