Standard output type syslog is obsolete

[almereyda]

On Ubuntu 21.10 with systemd 247, the appimaged unit reports:

Aug 31 02:44:28 ganglion systemd[13045]: /home/yala/.config/systemd/user/appimaged.service:14: Standard output type syslog is obsolete, automatically updating to journal. Please update your unit file, and consider removing the setting altogether.
Aug 31 02:44:28 ganglion systemd[13045]: /home/yala/.config/systemd/user/appimaged.service:15: Standard output type syslog is obsolete, automatically updating to journal. Please update your unit file, and consider removing the setting altogether.

go-appimage/src/appimaged/prerequisites.go

Lines 505 to 506 in 6249fab

	StandardOutput=syslog
	StandardError=syslog

The suggestion from the output is to either remove these lines altogether, or to replace syslog with journal.

[probonopd]

What happens on older systems if those two lines are removed?
Why were they needed in the first place?

[almereyda]

These properties were introduced in

go-appimage/src/appimaged/prerequisites.go

Lines 487 to 488 in 47fae04

	StandardOutput=syslog
	StandardError=syslog

To my current knowledge, the Standard* properties are rarely used in systemd units and might simple happen to be there for some copy and paste attempt (see commit description) and might not yet have been evaluated for necessity.

[probonopd]

So you think it is safe to just delete those 2 lines without any risk of breaking it on older distributions, such as Ubuntu trusty?