Fix documentation around node['postfix']['main']['relayhost'] attribute

Signed-off-by: Sean OMeara <someara@opscode.com>
Fix logic around include_recipe 'postfix::virtual_aliases_domains'

Signed-off-by: Sean OMeara <someara@opscode.com>
updating CHANGELOG and bumping metadata
Fix FreeBSD isms in Postfix.
Rubocop fixes.
Merge pull request #75 from clewis/freebsd-support

Fix FreeBSD isms in Postfix.
updating CHANGELOG and bumping metadata