updated broken links (#124)

tforge points to an empty repository
https://lists.randombit.net/mailman/listinfo/cryptography is not working at the moment, but is indexed in google, so I think it just does not work at the moment

README.md

@@ -113,7 +113,7 @@ A curated list of cryptography resources and links.
 
 ### Courses
 
-- [A Self-Study Course In Block-Cipher Cryptanalysis](https://www.schneier.com/academic/paperfiles/paper-self-study.pdf) -This paper attempts to organize the existing literature of block-cipher cryptanalysis in a way that students can use to learn cryptanalytic techniques and ways to break algorithms, by Bruce Schneier.
+- [A Self-Study Course In Block-Cipher Cryptanalysis](https://www.schneier.com/wp-content/uploads/2016/02/paper-self-study.pdf) -This paper attempts to organize the existing literature of block-cipher cryptanalysis in a way that students can use to learn cryptanalytic techniques and ways to break algorithms, by Bruce Schneier.
 - [Applied Cryptography](https://www.udacity.com/course/applied-cryptography--cs387) - Cryptography is present in everyday life, from paying with a credit card to using the telephone. Learn all about making and breaking puzzles in computing.
 - [Crypto Strikes Back!](https://www.youtube.com/watch?v=ySQl0NhW1J0) - This talk will cover crypto vulnerabilities in widely-deployed systems and how the smallest oversight resulted in catastrophe.
 - [Cryptography](https://www.coursera.org/learn/cryptography) - A practical oriented course in Cryptography by University of Maryland College Park.