[Merge] lp:~abreu-alexandre/webbrowser-app/devtools-support into lp:webbrowser-app

[David Barth]

The env. variables may still just be simpler if the port option needs to be transported to child processes, like the oxide renderers. Otherwise you have to add tons of command line options to multiple progames, where a variable is just the right unix way to do it.
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https://code.launchpad.net/~abreu-alexandre/webbrowser-app/devtools-support/+merge/225561
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