Remove references to boot2docker replace with docker-machine

- boot2docker is deprecated in the 1.8.0
- docker-machine replaces it
- this fixes #14563
- Updating with thaJetzah comments

Signed-off-by: Mary Anthony <mary@docker.com>
Upstream-commit: 1825e06944db20ec677aa8d26b36e9036b0dd257
Component: engine

components/engine/docs/examples/mongodb.md

@@ -158,8 +158,8 @@ as daemon process(es).
     # Usage: mongo --port <port you get from `docker ps`> 
     $ mongo --port 27017
 
-    # If using boot2docker
-    # Usage: mongo --port <port you get from `docker ps`>  --host <ip address from `boot2docker ip`>
+    # If using docker-machine
+    # Usage: mongo --port <port you get from `docker ps`>  --host <ip address from `docker-machine ip VM_NAME`>
     $ mongo --port 27017 --host 192.168.59.103
 
 > **Tip:**

components/engine/docs/examples/nodejs_web_app.md

@@ -187,10 +187,10 @@ Now you can call your app using `curl` (install if needed via:
 
     Hello world
 
-If you use Boot2docker on OS X, the port is actually mapped to the Docker host VM,
-and you should use the following command:
+If you use Docker Machine on OS X, the port is actually mapped to the Docker
+host VM, and you should use the following command:
 
-    $ curl $(boot2docker ip):49160
+    $ curl $(docker-machine ip VM_NAME):49160
 
 We hope this tutorial helped you get up and running with Node.js and
 CentOS on Docker. You can get the full source code at