Included httpsProxy key/value in sample client config.json.
Included httpsProxy key/value in sample client config.json.

Signed-off-by: Brett Randall <3a817d01b0aca4da51b95766d5e85950536c2c6e@gmail.com>

londoncalling/docker.github.io,londoncalling/docker.github.io,londoncalling/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,docker/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io