tomcat: three DIGEST authentication implementation issues

The replay-countermeasure functionality in the HTTP Digest Access Authentication implementation in Apache Tomcat 5.5.x before 5.5.36, 6.x before 6.0.36, and 7.x before 7.0.30 tracks cnonce aka client nonce values instead of nonce aka server nonce and nc aka nonce-count values, which makes it easi...