fix passenger headers issue (for passenger 5)

passenger_extension.rb

module PhusionPassenger
  module Utils

    # Utility functions that can potentially be accelerated by native_support functions.
    module NativeSupportUtils
      extend self

      NULL = "\0".freeze

      class ProcessTimes < Struct.new(:utime, :stime)
      end

      def split_by_null_into_hash(data)
        args = data.split(NULL, -1)
        args.pop
        headers_hash = Hash.new
        args.each_slice(2).to_a.each do |pair|
          headers_hash[pair.first] = pair.last unless headers_hash.keys.include? pair.first
        end
        return headers_hash
      end

      def process_times
        times = Process.times
        return ProcessTimes.new((times.utime * 1_000_000).to_i,
          (times.stime * 1_000_000).to_i)
      end
    end

  end # module Utils
end # module PhusionPassenger