Aanand Prasad 3e2fd6a2a1 Use DOCKER_HOST environment variable to find Docker daemon ...

Removed all "smart" connection logic. Fig either uses the DOCKER_HOST
environment variable if it's present, or passes `None` to docker-py,
which does the "right thing" (i.e. falls back to the Unix socket).

This means we no longer know at URL-deciding time whether we can connect
to the Docker daemon, so we wrap `dispatch` in a `try/except` which
catches `requests.exceptions.ConnectionError`.

2014-01-16 16:40:55 +00:00

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