create_new_id

# File lib/cgi/session.rb, line 171
    def create_new_id
      require 'securerandom'
      begin
        # by OpenSSL, or system provided entropy pool
        session_id = SecureRandom.hex(16)
      rescue NotImplementedError
        # never happens on modern systems
        require 'digest'
        d = Digest('SHA512').new
        now = Time::now
        d.update(now.to_s)
        d.update(String(now.usec))
        d.update(String(rand(0)))
        d.update(String($$))
        d.update('foobar')
        session_id = d.hexdigest[0, 32]
      end
      session_id
    end