+2013-08-18, Version 5.4.0
+ * collectd: The "LoadPlugin" config option no longer attempts to load
+ plugins twice. If more than one "LoadPlugin" statement or block is
+ encountered, only the first will have any effect.
+ * collectd: The "AutoLoadPlugin" option allows to automatically load
+ plugins for which a configuration is found.
+ * collectd: The "WriteQueueLimitHigh" and "WriteQueueLimitLow" options
+ allow collectd to drop values when under stress, to avoid running out
+ of memory. Thanks to Yves Mettier for his patch.
+ * amqp plugin: The "GraphiteSeparateInstances" and
+ "GraphiteAlwaysAppendDS" options have been added. Thanks to Laurent
+ for the patch.
+ * aquaero plugin: This new plugin reads various metrics, e.g. fan
+ speeds and temperatures, from Aquaero 5, a fan and water cooling
+ control panel. Thanks to Alex Deymo for his patch.
+ * curl plugin: The "MeasureResponseCode" option has been added. Thanks
+ to Jan Matějka for his patch.
+ * curl_json plugin: Support for UNIX domain sockets and array wildcards
+ has been added. Thanks to Jim Radford for his patch.
+ * curl_xml plugin: Support for long URLs has been improved.
+ * cgroups plugin: This new plugin collects CPU accounting information
+ for processes in a cgroup. Thanks to Michael Stapelberg for his patch.
+ * df plugin: The "ValuesAbsolute" and "ValuesPercentage" options have
+ been added. Thanks to Vedran Bartonicek for the patch.
+ * exec plugin: Do UID / GID lookups before forking. This should prevent
+ a race condition in the NSS library. Thanks to Ceri Storey for the
+ patch.
+ * lvm plugin: This new plugin collects size information from Linux'
+ Logical Volume Manager (LVM). Thanks to Chad Malfait for his work.
+ * memcached plugin: Support for increment and decrement counts has been
+ added. Thanks to Blake Matheny for the patch.
+ * mic plugin: This new plugin collects CPU and memory usage, power
+ consumption and temperatures of Intel's Many-Integrated-Core (MIC)
+ architecture, such as Xeon Phi cards. Thanks to Evan Felix for his
+ work.
+ * netlink plugin: This plugin has been converted to use the supported
+ "libmnl" library. Thanks to Andreas Henriksson for his patch.
+ * nginx plugin: Collection of accepted and handled connections has been
+ added. Thanks to Patrick Shan for his patch.
+ * sigrok plugin: This new plugin collects metrics from sigrok, a signal
+ processing framework reading various hardware devices, from light
+ meters to spectrum analyzers. Thanks to Bert Vermeulen for his patch.
+ * statsd plugin: This new plugin listens to a UDP socket and reads
+ metrics in the StatsD format.
+ * varnish plugin: Many additional metrics have been added. Thanks to
+ Nick Stenning for his patch.
+ * write_graphite plugin: Support for "UDP" has been added. Thanks to
+ Javier Maestro for his patch.
+ * write_riemann plugin: The "TTLFactor" option has been added.
+ * zfs_arc plugin: Support for FreeBSD has been added. Thanks to Xin Li
+ for his patch.
+
+2013-07-13, Version 5.3.1
+ * Documentation: Various fixes.
+ * Configuration: Fix error handling: Errors in included files were
+ ignored, causing configuration mistakes to go unnoticed.
+ * dns plugin: Don't abort when PCAP returns an error.
+ * modbus plugin: The reconnection strategy was improved, fixing a
+ segfault in the libmodbud library. Thanks to Stefan Nickl and
+ Fabien Wernli for their patches.
+ * mysql plugin: The notification about a newly running MySQL slave
+ thread has been fixed. Thanks to Joaquín Cuenca Abela for the patch.
+ * snmp plugin: A build issue has been fixed (C99 mixed declaration).
+ The end-of-tree check has been improved by Pierre-Yves Ritschard.
+ * threshold plugin: Handling of the "Interesting" configuration option
+ has been fixed. Thanks to Björn for the patch.
+ * write_riemann plugin: A memory leak has been fixed. Thanks to Dave
+ Cottlehuber for reporting it.
+
+2013-04-09, Version 5.3.0
+ * collectd: The "Include" statements can now be limited to include
+ only matching files in a directory. Thanks to Sebastian Harl for his
+ patch.
+ * collectd: Dispatches / writes are now handled by a thread pool. This
+ improves reliability and throughput for instances configured to act
+ as a "server". Thanks to Sebastian Harl and Dan Fandrich for
+ reviewing this change and fixing bugs.
+ * aggregation plugin: Selection of value lists is now possible using
+ regular expressions. Parts of the identifier of the resulting metric
+ can now be set via the configuration file.
+ * apcups plugin: The "ReportSeconds" option has been implemented.
+ * curl* plugins: Support for POST requests and custom request headers
+ has been added. Thanks to Dan Fandrich for his patch.
+ * curl_xml plugin: Support for XML namespaces has been added. Thanks
+ to Dan Fandrich for his patch.
+ * dbi plugin: Support for numeric options has been added. The
+ "Host" option has been added. Thanks to Daniel Hilst for his patch.
+ * disk plugin: Support for systems with >256 has been fixed. Thanks to
+ Greg Mason for his patch.
+ * libvirt plugin: Support for memory allocation has been added. Thanks
+ to Johan Wirén for his patch.
+ * netapp plugin: Support for "SnapVault", "VFiler" and deduplication /
+ compression and quota metrics. Thanks to Sebastian Harl for his
+ patches and teamix GmbH for sponsoring this work.
+ * postgresql plugin: The reconnection logic has been improved. Thanks
+ to Sebastian Harl for his patches.
+ * rrdtool, rrdcached plugins: The "CreateFilesAsync" option has been
+ implemented. When enabled, new RRD files will be created
+ asynchronously, which improved throughput of "server" instances.
+ Many thanks to Yves Mettier for all his input and code.
+ * tail_csv plugin: This new plugins allows to read metrics from CSV
+ files, such as Snort's statistics file. Thanks to Kris Nielander for
+ his patch.
+ * write_mongodb plugin: Authentication options have been added.
+ * write_riemann plugin: This new plugin allows sending metrics to
+ Riemann, a stream processing and alerting tool. Big thanks to
+ Pierre-Yves Ritschard for his work.
+