Security update for quagga (important)

This update for quagga fixes the following issues: - CVE-2017-16227: Fixed bgpd DoS via specially crafted BGP UPDATE messages boo1065641 - CVE-2018-5378: Fixed bgpd bounds check issue via attribute length Quagga-2018-0543,boo1079798 - CVE-2018-5379: Fixed bgpd double free when processing UPDATE...