Bugfix: set VMOD version numbers in the varnish container build.

Newer versions of the RPMs for compatibility with Varnish 6.2
evidently do not express dependencies narrowly enough.

container/Dockerfile.varnish

@@ -4,8 +4,8 @@ RUN yum install -y epel-release && yum update -y -q && \
     yum -q makecache -y --disablerepo='*' --enablerepo='varnishcache_varnish61' && \
     yum-config-manager --add-repo https://pkg.uplex.de/rpm/7/uplex-varnish/x86_64/ && \
     yum install -y -q varnish-6.1.1 && \
-    yum install -y -q --nogpgcheck vmod-re2 && \
-    yum install -y -q --nogpgcheck vmod-selector && \
+    yum install -y -q --nogpgcheck vmod-re2-1.6.1 && \
+    yum install -y -q --nogpgcheck vmod-selector-1.0.0 && \
     yum clean all && rm -rf /var/cache/yum
 RUN /bin/mkdir /var/run/varnish
 COPY bogo_backend.vcl /etc/varnish/