* lib/webrick/httpservlet/cgihandler.rb: use RbConfig.ruby. * test/ruby/envutil.rb: ditto. * benchmark/report.rb: ditto. * benchmark/runc.rb: ditto. * tool/eval.rb: ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26216 b2dd03c8-39d4-4d8f-98ff-823fe69b080e