v2.10.4

• Fix TLS connections in Influxdb/Elasticsearch features leaking file descriptors (#6989 #7018 ref/IP/12219)
• Fixes for delayed and one-time notifications (#5561 #6757)
• Improve performance for downtimes/comments added in HA clusters (#6885 ref/IP/9235)
• check_perfmon supports non-localized performance counter names (#5546 #6418)

Full changelog & announcement.