Adds rsyslog in between the logs and logstash and write the logs to disk
Remove the @source and @source_path since they're not useful (localhost)
Set the rsyslog server main config (default imported)
rsyslog: remove unused commented things
rsyslog.conf tweaks

* Bump the max message size to 32k
* Store precise timestamps on the disk
* Allow message duplication, we want it all !
* Allow access to the log files