fix(inputs.chrony): Support local (reference) sources

[Frankkkkk]

Summary

Local sources are directly connected to the server (PPS inputs from oscillators, GPS, etc..). They can be seen as stratum-0 sources.

The standard way of getting their name doesn't work as it is stored into their RefID instead.

This fixes that

Checklist

• No AI generated code was used in this PR

Related issues

resolves #15550

[telegraf-tiger]

Thanks so much for the pull request!
🤝 ✒️ Just a reminder that the CLA has not yet been signed, and we'll need it before merging. Please sign the CLA when you get a chance, then post a comment here saying !signed-cla

[Frankkkkk]

!signed-cla

[srebhan]

Thanks @Frankkkkk! Just a small comment regarding the comment. ;-) Maybe we could also move the peer-extraction to a function to avoid having to comment the special cases in two places?

[srebhan]

Thanks for the quick update! Please move all source-name logic into the now function as this makes the code in gather more readable.

[Frankkkkk]

I don't understand what you mean by "source-name logic into the now function" as they are different:

• gatherSources works on a SourceData in which the name is encoded into the IPv4
• gatherSourcesStats works on a SourceStats, in which the name is encoded into the RefID
  The logic for decoding is different (IP == "::" vs mode = sourceModeRef)

Cheers

[srebhan]

@Frankkkkk I see, didn't notice that the type is different. So keep the code locations but remove the link to the other repository!

[Frankkkkk]

@srebhan done

[telegraf-tiger]

Download PR build artifacts for linux_amd64.tar.gz, darwin_arm64.tar.gz, and windows_amd64.zip.
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Artifact URLs

DEB	RPM	TAR GZ	ZIP
amd64.deb	aarch64.rpm	darwin_amd64.tar.gz	windows_amd64.zip
arm64.deb	armel.rpm	darwin_arm64.tar.gz	windows_arm64.zip
armel.deb	armv6hl.rpm	freebsd_amd64.tar.gz	windows_i386.zip
armhf.deb	i386.rpm	freebsd_armv7.tar.gz
i386.deb	ppc64le.rpm	freebsd_i386.tar.gz
mips.deb	riscv64.rpm	linux_amd64.tar.gz
mipsel.deb	s390x.rpm	linux_arm64.tar.gz
ppc64el.deb	x86_64.rpm	linux_armel.tar.gz
riscv64.deb		linux_armhf.tar.gz
s390x.deb		linux_i386.tar.gz
		linux_mips.tar.gz
		linux_mipsel.tar.gz
		linux_ppc64le.tar.gz
		linux_riscv64.tar.gz
		linux_s390x.tar.gz

[srebhan]

Thanks for your contribution @Frankkkkk!