Attempt to convert args to binaries about muontrap HOT 3 CLOSED

This will be fixed in the upcoming v0.5.0 release.

MuonTrap.Daemon validates arguments and raises now. It also validates the other options before they get caught with the less-than-helpful argument error from Port.open. This was fixed when refactoring the option parsing code for MuonTrap.Daemon and MuonTrap.cmd/3 to one place.

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Another option would be to validate parameters and give good error messages. I can't tell you how much time I've wasted staring at Port.open/2 arguments for either fixing Dialyzer errors or exceptions like the one that you hit.

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+1 to validating that valid binaries are coming in. I wouldn't prefer an implicit conversion to string because the terms that you pass in may have some special String.Chars implementation that the developer is not expecting.

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