+2014-01-26, Version 5.4.1
+ * amqp plugin: Add support for RabbitMQ 0.4.x to avoid compiler
+ warnings. Thanks to Sebastian Harl for implementing this.
+ * apache / network plugins: Improved initialization order hopefully
+ resolved gcrypt initialization problems.
+ * aquaero plugin: The type used to submit fan utilization was fixed.
+ Thanks to Alex Deymo for the patch.
+ * cgroups plugin: A small memory leak was fixed. Checking the existence
+ of a mount option without a value was fixed. More permissive parsing
+ of the cpuacct.stats file fixes support for some versions of Linux.
+ Thanks to Marc Fournier for bug reports and patches.
+ * curl plugin: Fix <Match> blocks without an instance. Thanks to
+ Alexander Golovko for reporting and Sebastian Harl for fixing this.
+ * curl_json plugin: Potentially invalid memory access has been
+ sanitized. Thanks to Jim Radford for his patch.
+ * interface plugin: Fix behavior under FreeBSD 10: Reporting of
+ per-address statistics caused duplicate updates to the same metric.
+ Thanks to demon / @trtrmitya for the patch.
+ * write_graphite plugin: Use TCP to connect to Graphite by default. The
+ default changed from TCP to UDP between 5.3.1 and 5.4.0, which is a
+ regression. Thanks to Marc Fournier for fixing this. Reconnect
+ behavior was improved. Thanks to Michael Hart for his patch.
+ * zfs_arc plugin: Collect "allocated" and "stolen" on FreeBSD only.
+
+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.
++
+ 2015-02-26, Version 5.3.2
+ * Build system: Numerous fixes. Thanks to Bjørn Nordbø, Jim Radford,
+ KOMEDA Shinji, Lauri Tirkkonen, Manuel Luis Sanmartin Rozada, Marc
+ Fournier, Rainer Müller, Yoga Ramalingam and Yves Mettier. #326,
+ #373, #653, #828
+ * collectd: A use-after-free has been fixed in the "parse_value()"
+ function. Thanks to Matthias Urlichs.
+ * collectd: Fix carriage return sign in types_list Thanks to Marc
+ Fournier and @NsLib.
+ * collectd: Fix programming error in src/configfile.c Thanks to
+ Wilfried Goesgens.
+ * collectd: An off-by-one error has been fixed in the
+ "strstripnewline()" function. Patch by Florian Forster.
+ * collectd: Use the complain mechanism to report filter chain write
+ failures. Thanks to Sebastian Harl.
+ * collectd: Spelling and grammar of error messages have been fixed.
+ Thanks to Katelyn Perry and Tim Laszlo.
+ * collectdctl: Fixed buffering issues which caused trouble on AIX and
+ Solaris. Thanks to Yoga Ramalingam.
+ * Documentation: Details and example about multi-instance filterchain
+ targets have been added. Thanks to Marc Fournier.
+ * Documentation: The "CollectStatistics" option of the rrdcached has
+ been documented. Thanks to Micha Krause. #907
+ * Documentation: The write_redis has been documented. Thanks to Marc
+ Fournier.
+ * Documentation: The synopsis of the threshold has been fixed. Thanks
+ to Fabien Wernli.
+ * Documentation: The "GraphiteSeparateInstances" and
+ "GraphiteAlwaysAppendDS" options of the amqp have been documented.
+ Thanks to Marc Fournier.
+ * aggregation: "utils_vl_lookup": A race when creating user objects
+ has been fixed. Thanks to Sebastian Harl. #535
+ * cpu: Temperature code for Mac OS X has been removed.
+ Thanks to Florian Forster and Marc Fournier. #22
+ * csv: A regression which would lead to the "DataDir" option to be
+ ignored has been fixed. Thanks to Manuel Luis Sanmartin Rozada.
+ * curl, curl-json, curl-xml and write_http plugins: Call
+ "curl_global_init()" in the plugins' "init()" callback. Thanks to
+ Jeremy Katz.
+ * curl and memcachec plugins: Fix calculation of gauge, average,
+ minimum and maximum. Previously, they were calculated from the start
+ of the daemon, which is not the documented behavior. Thanks to
+ Florian Forster. #663
+ * dbi plugin: Compatibility with new versions of libdbi has been
+ restored. Thanks to Florian Forster. #950
+ * exec, unixsock plugins: Fix parsing of the "time" option of the
+ "PUTNOTIF" command. Thanks to Adrian Miron. #477
+ * java: Conversion from Java's time representation to collectd's
+ representation has been fixed. Thanks to Manuel Luis Sanmartín
+ Rozada.
+ * ipmi: A conflict with the java over the "SIGUSR2" signal has been
+ fixed. Thanks to Vincent Bernat. #114
+ * java: Make sure "cjni_thread_detach()" is called on all paths.
+ Thanks to Florian Forster.
+ * logfile and syslog plugins: Avoid total silence in case of a
+ misconfiguration. Thanks to Marc Fournier and Wilfried Goesgens.
+ * memcached: Connecting to a UNIX socket has been fixed. Thanks to Jim
+ Radford.
+ * network: Support for recent versions of gcrypt has been added.
+ Thanks to Vincent Bernat. #632
+ * network: Robustness of the client connecting behavior has been
+ improved. Thanks to Florian Forster. #627
+ * python: Don't create empty "meta_data_t" objects. Thanks to Florian
+ Forster. #716
+ * python: Fix Py list length check in "cpy_build_meta()". Thanks to
+ Yoga Ramalingam.
+ * python: The "interval" member was fixed to export seconds as a
+ double. Thanks to Justin Burnham.
+ * replace and set targets: Fix error message. Thanks to Marc Fournier.
+ #448
+ * rrdtool and rrdcached plugins: Honor the "DataDir" config option;
+ this fixes a regression. Thanks to Florian Forster. #380
+ * rrdtool and rrdcached plugins: A memory leak when creating RRD files
+ has been fixed. Thanks to Yves Mettier. #661
+ * snmp: Fix a memory leak. Thanks to Marc Fournier and Pierre-Yves
+ Ritschard. #610, #804
+ * swap: Fix behavior under OpenVZ by making "cached" optional. Thanks
+ to Florian Forster. #733
+ * threshold: Population of the "time" field in notifications has been
+ added. Thanks to Manuel Luis Sanmartín Rozada.
+ * libvirt: Only gather stats for running domains. Thanks to Ruben
+ Kerkhof.
+ * write_graphite: Escape characters not supported by Graphite. Thanks
+ to Pierre-Yves Ritschard and Marc Fournier.
+ * write_http: Make callback names context-dependent. Thanks to Marc
+ Fournier. #821
+ * write_riemann: Receive acknowledge message when using TCP. Thanks to
+ John-John Tedro.
2013-07-13, Version 5.3.1
* Documentation: Various fixes.