Kernel.system doesn't work with environement parameters
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                 Key: JRUBY-6234
                 URL: https://jira.codehaus.org/browse/JRUBY-6234
             Project: JRuby
          Issue Type: Bug
          Components: Ruby 1.9.2
    Affects Versions: JRuby 1.6.5
         Environment: jruby 1.6.5 (ruby-1.9.2-p136) (2011-10-25 9dcd388) (Java 
HotSpot(TM) Client VM 1.6.0_21) [SunOS-x86-java]

            Reporter: Tnarik
            Assignee: Thomas E Enebo
            Priority: Minor


Since Ruby 1.9.2 at least, Kernel.system has the following signatures:
    system([env,] command... [,options])

, where Kernel.system({"FOO" => "BAR"}, "echo $FOO") would produce "BAR" as 
output and return 'true'

On JRuby 1.6.5, it returns 'nil' instead.

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