> Extended Security Maintenance; doesn't necessarily exist for
> every release and this system may not have it installed, but if
> available, the policy for updates is such that unattended-upgrades
> should also install from here by default.

Signed-off-by: Raoul Bhatia <raoul@bhatia.at>

Support Ubuntu Extended Security Maintenance (ESM)

….erb

add the Unattended-Upgrade::MailReport setting to unattended-upgrades.erb

add SyslogEnable and SyslogFacility options to unattended-upgrades.erb

README: fix wording about the mail hash

modulesync 3.1.0

modulesync 4.0.0

add support for Package-Witelist

Allow puppetlabs/apt < 9 and puppetlabs/stdlib < 8

Update dependencies

unattended-upgrades does *not* need special configuration to `dpkg`
for proper operation. It handles those itself. All that parameter does
is changes the `dpkg` configuration for *other* `dpkg` runs.

This will, for example, affect major upgrades, typically done by hand,
and not unattended-upgrades, which was *not* designed for that
purpose. In those cases, unsuspecting users will see their old
configuration file versions silently kept in place, which most
definitely *will* break things on upgrade, rather noisily in the end.

People unfamiliar with this mechanism will have a hard time figuring
out what has happened, and while recovery is possible, it is tricky
without special tooling. I wrote such a tool here:

https://gitlab.com/anarcat/koumbit-scripts/-/blob/master/vps/clean_conflicts

... but it not well known and definitely not shipped with Debian by
default.

While it is nice that the unattended-upgrades module allows users to
change dpkg options, this can be more easily (and directly) done with
the `apt::conf` parameter in the first place.

This also marks the feature as deprecated. Once a proper deprecation
delay has passed, the code can be removed (with, for example, PR #190).

disable by default and deprecate dpkg "options" parameter

Allow stdlib 8.0.0

Add support for Puppet 7

- Also moves Buster into the default settings area implicitly, since
  Buster is now in oldstable.

Add support for Debian 11

modulesync 4.2.0

release 6.0.0