updated default -H docs

[matthewmueller]

discussed: #938

[crosbymichael]

@matthewmueller Does this need to be changed in the command line also?

[matthewmueller]

@crosbymichael woops. thought the rst was being pulled in. updated.

[crosbymichael]

@matthewmueller In the cli it says the unix socket part twice

[vieux]

@matthewmueller to be consistent with docker --help, I think commands.go should be:

help := fmt.Sprintf("Usage: docker [OPTIONS] COMMAND [arg...]\n -H=[unix://%s]: tcp://host:port to bind/connect to or unix://path/to/socket to use\n\nA self-sufficient runtime for linux containers.\n\nCommands:\n", DEFAULTUNIXSOCKET)

[matthewmueller]

@vieux okay fixed help based on what you recommended, anything else?

[vieux]

@matthewmueller nope, thanks

LGTM

[crosbymichael]

LGTM