Use collective.recipe.backup 2.16 that fixes blob backup issue.

https://github.com/collective/collective.recipe.backup/issues/17
Add PloneHotfix20131210.
Plone 4.3.3.
Bump up versions
supervisordctl -> supervisorctl
Check md5sums for varnish part
Varnish 3.0.6, HAProxy 1.4.25, PCRE 8.36.
Force HTTPS. Lazy Shibboleth session.
Remove ipcast
buildout 2.2.4, MySQL-python 1.2.5, supervisor 3.1.3.
iptables: allow root, -d. Use 127.0.0.1 instead of "localhost".
Add md5sums to memcached
Add md5sum for HAproxy archive (no verify!).
Upgrade memcached to 1.4.21, fix parts deps.
Add varnish-fix-perms part.
_varnish_ping_ and _haproxy_ping_ for deployment