Billion Laughs (and small check whether UTF-7 is used on a website)

This is a test for checking whether an application is vulnerable for Billion Laughs / Quadratic Blowup. 
Right now this does NOT work with Python 3. I also added the option --net <ip> <port> which is only used for the Billion Laughs and Quadratic Blowup tests. 

If you have any questions please feel free to ask me.