6.0.0.rc3

• Daemon: Two new metric types have been added: "up down counters" in integer and floating point variants. Thanks to @octo. #4287
• OpenTelemetry plugin: This new plugin provides the ability to export as well as receive metrics via OTLP. It supersedes the write_open_telemetry plugin. Thanks to @octo. #4271
• Write Prometheus plugin: A possible deadlock due to a leaked mutex has been fixed. Thanks to @octo. #4285
• Write Prometheus plugin: Bugs in the handling of metrics from multiple resources as well as printing of metrics without labels have been fixed. Thanks to @octo. #4284
• gpu_sysman plugin: Use real collectd metric functions unit tests. Thanks to @eero-t. #4223
• memory plugin: The system.linux.memory.available metric has been added. Thanks to @octo. #4275
• swap plugin: The system.paging.faults metric has been added. Thanks to @octo. #4278