The package was removed due to its SRU bug(s) not being verified in a timely fashion.
haproxy (1.5.10-1ubuntu0.2) vivid; urgency=medium * Ensure that haproxy processes are terminated correctly when executing stop/restart operations, easing backports to pre-systemd versions of Ubuntu (LP: #1481737). -- Louis Bouchard <email address hidden> Wed, 09 Dec 2015 08:45:27 -0600