v1.5.8

• Upgrade to td-agent 2.3.1/fluentd 0.12.20. Several bugfixes and features, notably:
  • Add 'buffer_queue_full_action' parameter to control buffer actions
  • Fix warning at startup when using in_tail multiline parsing
  • improved json parsing performance via the 'oj' library.
• Upgrade fluent-plugin-google-cloud to 0.4.14 from 0.4.13:
  • No functional change, fixes gem dependency and permission issues.