Merge pull request #4296 from morgante/patch-1

Remove trailing slash from --host parameter in contrib/vagrant-docker/README.md

contrib/vagrant-docker/README.md

@@ -31,7 +31,7 @@ stop on runlevel [!2345]
 respawn
 
 script
-    /usr/bin/docker -d -H=tcp://0.0.0.0:4243/
+    /usr/bin/docker -d -H=tcp://0.0.0.0:4243
 end script
 ```