puppetlabs/puppet — pull request #1963 by adrienthebo (2013-10-02 18:42:38+00:00)
Title: (maint) Prefer json over pson for logstash_event

We can't always rely on json being present; hence PSON being vendored
for this purpose. This commits switches the logstash_event log
destination from trying to require and use json to simply use pson.