Document last quarter of Tomcat security advisories

Latest advisory is awaiting upstream release

PR: 214599
PR: 215865
Security: CVE-2016-0762
Security: CVE-2016-5018
Security: CVE-2016-6794
Security: CVE-2016-6796
Security: CVE-2016-6797
Security: CVE-2016-6816
Security: CVE-2016-8735
Security: CVE-2016-8745
Security: https://vuxml.FreeBSD.org/freebsd/0b9af110-d529-11e6-ae1b-002590263bf5.html
Security: https://vuxml.FreeBSD.org/freebsd/3ae106e2-d521-11e6-ae1b-002590263bf5.html
Security: https://vuxml.FreeBSD.org/freebsd/e5ec2767-d529-11e6-ae1b-002590263bf5.html