rsync: update to 3.4.3

[graysky2]

📦 Package Details

Maintainer: @mstorchak
_{(You can find this by checking the history of the package Makefile.)}

Description:

Changelog: https://download.samba.org/pub/rsync/NEWS#3.4.3

This is an important update fixing 6 CVEs: CVE-2026-29518, CVE-2026-43617, CVE-2026-43619, CVE-2026-43618,
CVE-2026-43620, and CVE-2026-4523

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🧪 Run Testing Details

• OpenWrt Version: SNAPSHOT
• OpenWrt Target/Subtarget: x86/64-glibc
• OpenWrt Device: Intel N150

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✅ Formalities

• I have reviewed the CONTRIBUTING.md file for detailed contributing guidelines.

If your PR contains a patch:

• It can be applied using git am
• It has been refreshed to avoid offsets, fuzzes, etc., using

  make package/<your-package>/refresh V=s

• It is structured in a way that it is potentially upstreamable
  _{(e.g., subject line, commit description, etc.)
  We must try to upstream patches to reduce maintenance burden.}

[mstorchak]

Thank you @graysky2
LGTM, Ack.
Please backport this to 25.12 and 24.10 too, or let me know if you want me to do this.

[graysky2]

Probably good if you make the BPs