bug#48323: guix-daemon.service and guix-publish.service use deprecated StandardError/StandardOutput features

[Vagrant Cascadian]

Both guix-daemon.service and guix-publish.service make use of
StandardError=syslog and StandardOutput=syslog.

When building a guix 1.2.0 or 1.3.0rc* on Debian, I get the following
warnings when checking with lintian:

W: guix: systemd-service-file-uses-deprecated-syslog-facility 
lib/systemd/system/guix-daemon.service StandardError=syslog
N:
W: systemd-service-file-uses-deprecated-syslog-facility
N:
N:   The specified systemd service file specifies StandardOutput= or
N:   StandardError= that references syslog or syslog-console.
N:
N:   This is discouraged, and systemd versions 246 and above will log a
N:   warning about this.
N:
N:   Refer to
N: 
https://github.com/systemd/systemd/blob/6706384a89ae0c462e7172588c80667190c4d9e2/NEWS#L724
N:   for details.
N:
N:   Severity: warning
N:
N:   Check: systemd

Following the above link has this to say:

        * StandardError= and StandardOutput= in unit files no longer support
          the "syslog" and "syslog-console" switches. They were long removed
          from the documentation, but will now result in warnings when used,
          and be converted to "journal" and "journal+console"
          automatically.

So apparently need to switch the .service files to use "journal". I am
not sure what implications that would have for installing guix on a
foreign distro, such as minimum systemd version, or if anything needs
significant changes.

Presumably at some point support for this Standard*=syslog will be
dropped entirely from systemd...


live well,
  vagrant

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