[racket] New Artifacts

New Artifacts posted: Improved! Low-Fat! Exciting!
 https://github.com/plt/racket/wiki/Artifacts

1. Specifying a HMAC-SHA1 stuffer for the stateless web-server

2. Split a string into lines

3. Fetch the contents of a URL

4. Generate a n-byte key for use in MAC authentication (like HMAC-SHA1)

5. How to generate a Message Authentication Code (MAC) and authenticate
a signed message.

6. Controversial code: cleaning up state on exit, when errors are expected

7. Redirecting an HTTP-scheme URL to an HTTPS-scheme URL using two servlets

8. Parsing libpcap files

9. Directly calling the OpenSSL executable from Racket

10. More OpenSSL: generating an HMAC-SHA1 digest

11. How to generate a rotating key-value, which changes at some
arbitrary interval.

12. AJAX: How to build a response to an HTTPXmlRequest

13. How to Build a Context-Free Grammar with Racket's unique
Recursive Contract System

Review! Debate! Criticize! Mock! Contribute!