rack.rb in instana-1.7.3

- old
+ new

@@ -1,4 +1,8 @@
+# FIXME: We really only need "cgi/util" here but Ruby 2.4.1 has an issue:
+# https://bugs.ruby-lang.org/issues/13539
+require "cgi"
+
 module Instana
   class Rack
     def initialize(app)
       @app = app
     end