v11.5.0

• syslog.max_message_size is now a configurable property. The default value is 8k.
• syslog.blackbox.log_filename property configures blackbox to tag its log lines with the filename. Default will not include filename.
• Adds a parsable logstash filter that makes log messages more filterable by processing inner JSON and ensuring timestamps are human readable.
• Bump golang to address glang CVE-2019-16276