Remove SSLv3 protocol support

This is a reworked version of a PR from tas50 against open source
which was made more urgent by the publication of the poodle exploit
https://github.com/opscode/omnibus-chef-server/pull/41
update changelog
Update allowed ssl ciphers
Merge pull request #548 from opscode/ma/poodle_master

Remove SSLv3 protocol support