Deprecate and add expiration date to Puppet 4 ports
Puppet 4 was part of Puppet Enterprise 2016.4.15 (LTS) [1], which has reached
EOL in december 2018 [2].
Users of this version of the Puppet ecosystem are encouraged to update to
Puppet 5 (sysutils/puppet5) or Puppet 6 (sysutils/puppet6).
References:
- https://puppet.com/docs/pe/2019.0/component_versions_in_recent_pe_releases.html
- https://puppet.com/misc/puppet-enterprise-lifecycle
With hat: puppet