jruby/jruby — pull request #2019 by chrisseaton (2014-10-04 23:45:23+00:00)
Title: Warn if the user sets a property that we don't recognise.

I often think I've set a property via `-X`, but I haven't because I got the name wrong. Do we want to warn if we don't recognise a property that looks like it should be aimed at us (it starts with `jruby.`)?