Using the logstash Plugin

I have installed the logstash plugin. However teh options to configure it are not shown in the Jenkins->Manage Jenkins->Configure System I have tried reinstall multiple times as well as previous builds but nothing seems to work. -- You received this message because you are subscribed to the

Logger Features

Is there a list of all logger features that Jenkins supports ? I am creating a dataset and wanted to have every single feature on a separate logger entry and then get all possible entries in a categorical manner for my jobs -- You received this message because you are subscribed to the