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+chrony (4.1~pre1-1) experimental; urgency=medium
+
+  Starting with chrony 4.0, it is possible to specify NTP sources in files
+  having the .sources suffix. In Debian, these files can be placed in
+  /etc/chrony/sources.d/ or any other directories specified by the 'sourcedir'
+  directive.
+  I would like to draw your attention that with chrony 4.1, each line of a
+  source file *must* be terminated by a trailing newline. Failing that, the NTP
+  source(s) will be ignored.
+
+ -- Vincent Blut <vincent.debian@free.fr>  Sun, 25 Apr 2021 12:44:09 +0200
+
+chrony (3.4-2) unstable; urgency=medium
+
+  To reduce the range of operations available to chronyd, and thereby decrease
+  the kernel attack surface, a system call filter is now active by default
+  wherever¹ possible.
+  Please, take into account that this change prevents the use of the
+  “mailonchange” directive in chrony.conf as the chronyd process will not be
+  allowed to fork and execute the sendmail binary. Therefore, it is fundamental
+  to disable the system call filter to continue using this directive!
+
+  To do so, edit the /etc/default/chrony file and substitute the “-F -1”
+  parameter with “-F 0”. Restart chrony afterward.
+
+  ¹Are currently excluded alpha, ia64, m68k, riscv64, sh4 and sparc64
+   architectures due to lack of support in “libseccomp” and/or the Linux kernel.
+
+ -- Vincent Blut <vincent.debian@free.fr>  Sun, 10 Feb 2019 18:44:22 +0100
+
+chrony (2.2.1-1) unstable; urgency=medium
+
+  In chrony versions before 2.2, the 'chrony.keys' file contained a command
+  key used for run-time configuration via the 'chronyc' command-line tool.
+  Starting from this version, support for this authentication method has been
+  dropped in favor of a Unix domain socket accessible only *locally* by root or
+  the _chrony system user. Consequently, if you refuse to use the 'chrony.keys'
+  file template provided by the maintainers when upgrading, please don’t forget
+  to manually remove the obsolete command key (ID 1) in the aforementioned file.
+
+ -- Vincent Blut <vincent.debian@free.fr>  Sun, 07 Feb 2016 17:02:30 +0100
+
+chrony (2.1.1-1) unstable; urgency=medium
+
+  From this version, 'chronyd' will strictly act as an NTP client by default. If
+  you want it to serve time to other systems, please do so by configuring the
+  'allow' directive.
+
+ -- Vincent Blut <vincent.debian@free.fr>  Mon, 12 Oct 2015 19:12:39 +0200
+
+chrony (1.31.1-1) unstable; urgency=medium
+
+  From now on, we use the "hwclockfile" directive in /etc/chrony/chrony.conf.
+  Basically, it makes the detection of the standard (Local or UTC time) set
+  in /etc/adjtime — and used by the hardware clock — clearer compared to the
+  text processing method we used to use in the post install script to complete
+  the same task. Note that it overrides the "rtconutc" directive.
+
+  Also, we now create the _chrony system user to which chronyd will drop root
+  privileges. For users already allowing chronyd to drop root privileges in
+  favor of the user configured by the "user" directive in
+  /etc/chrony/chrony.conf, your configuration will remain unchanged and will
+  still work as intended.
+  However, some users might use a custom init script to accomplish the same
+  task by invoking chronyd with the '-u' option. We advise you to drop this
+  option from your init script before upgrading, otherwise you’ll have to
+  readjust the owner of the /var/l{ib,og}/chrony directories (recursively) to
+  the user you configured in your init script.
+
+ -- Vincent Blut <vincent.debian@free.fr>  Sun, 6 Sep 2015 22:14:54 +0200