title: Error response "proxyconnect tcp: EOF" from daemon when running docker run hello-world in docker quickstart terminal
body: <p>I'm running docker toolbox on windows version 10.0.15063 behind corporate proxy, and I'm getting the following error when i run the command <code>docker run hello-world</code></p>
  
  <pre><code>Unable to find image 'hello-world:latest' locally
  C:\Program Files\Docker Toolbox\docker.exe: Error response from daemon: Get https://registry-1.docker.io/v2/: proxyconnect tcp: EOF.
  See 'C:\Program Files\Docker Toolbox\docker.exe run --help'
  </code></pre>
  
  <p>I'm getting the same error on attempting to login to docker using <code>docker login</code>.
  I've already tried exporting HTTPS_PROXY and HTTP_PROXY in /Docker Toolbox/start.sh and adding the same to my environment variables but none of these approaches seem to be working.</p>
  
  <p>Here's my <code>docker info</code></p>
  
  <pre><code>$ docker info
  Containers: 0
   Running: 0
   Paused: 0
   Stopped: 0
  Images: 0
  Server Version: 18.09.6
  Storage Driver: overlay2
   Backing Filesystem: extfs
   Supports d_type: true
   Native Overlay Diff: true
  Logging Driver: json-file
  Cgroup Driver: cgroupfs
  Plugins:
   Volume: local
   Network: bridge host macvlan null overlay
   Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
  Swarm: inactive
  Runtimes: runc
  Default Runtime: runc
  Init Binary: docker-init
  containerd version: bb71b10fd8f58240ca47fbb579b9d1028eea7c84
  runc version: 2b18fe1d885ee5083ef9f0838fee39b62d653e30
  init version: fec3683
  Security Options:
   seccomp
    Profile: default
  Kernel Version: 4.14.116-boot2docker
  Operating System: Boot2Docker 18.09.6 (TCL 8.2.1)
  OSType: linux
  Architecture: x86_64
  CPUs: 1
  Total Memory: 989.4MiB
  Name: default
  ID: PNCR:EWZF:D4O3:7KDP:UW7W:4NEO:YGTT:CHWV:VF5U:YTE6:GD66:WKHS
  Docker Root Dir: /mnt/sda1/var/lib/docker
  Debug Mode (client): false
  Debug Mode (server): false
  HTTP Proxy: http://xxxx:xxxx
  HTTPS Proxy: https://xxxxx:xxxx
  No Proxy: 192.168.99.100
  Registry: https://index.docker.io/v1/
  Labels:
   provider=virtualbox
  Experimental: false
  Insecure Registries:
   127.0.0.0/8
  Live Restore Enabled: false
  </code></pre>
  
  <p>Here's what i get on ssh-ing into the default machine and running <code>sudo vi /var/lib/boot2docker/profile</code></p>
  
  <pre><code>CACERT=/var/lib/boot2docker/ca.pem
  DOCKER_HOST='-H tcp://0.0.0.0:2376'                                                                             
  DOCKER_STORAGE=aufs                                                                                                                                     
  DOCKER_TLS=auto                                                                                                                                      
  SERVERKEY=/var/lib/boot2docker/server-key.pem                                                                                                               
  SERVERCERT=/var/lib/boot2docker/server.pem                                                                                                                                                                                                                                                                               
  export "HTTP_PROXY=http://proxy2:8080"                                                                                                                      
  export "HTTPS_PROXY=https://proxy2:8080"                                                                                                                    
  export "NO_PROXY=192.168.99.100"
  </code></pre>
  
  <p>I'm I missing something? I've been working on this for the last hour without any luck.</p>