Using os.Args includes the process bin name

[timfallmk]

From the comment:

// If Args is non-nil, it gives the command-line args for the
// daemon-process. If it is nil, the result of os.Args will be used
// (without program name).

This is not strictly true. prepareEnv, in the case no Args passed, sets the Args equal to os.Arg which includes the process name. Changing this to the following would fix it.

d.Args = os.Args[1:]

I suspect this is related to #33

[sevlyar]

Thank you for the report, @timfallmk
I will fix documentation.