generate_boundary (MailFactory)

    # File lib/mailfactory.rb, line 219
      def generate_boundary()
        randomstring = Array.new()
        1.upto(25) {
          whichglyph = rand(100)
          if(whichglyph < 40)
            randomstring << (rand(25) + 65).chr()
          elsif(whichglyph < 70)
            randomstring << (rand(25) + 97).chr()
          elsif(whichglyph < 90)
            randomstring << (rand(10) + 48).chr()
          elsif(whichglyph < 95)
            randomstring << '.'
          else
            randomstring << '_'
          end
        }
        return("----=_NextPart_#{randomstring.join()}")
      end