Proof-of-Concept for proxy TLS support

The code is quite messy, but particularly the argument parsing and
volume-mounting. Also, it doesn't support args with spaces, or
non-absolute file-paths.

test/setup.sh

@@ -15,3 +15,10 @@ for HOST in $HOSTS; do
     run_on $HOST chmod a+x $DOCKER_NS ./weave
     run_on $HOST sudo service docker restart
 done
+
+echo Setting up Docker TLS on hosts
+(cd ./tls && make)
+chmod 0600 tls/*
+for HOST in $HOSTS; do
+    rsync -az -e "$SSH" ./tls/ $HOST:~/tls/
+done