AdguardTeam / AdguardTeam/dnsproxy

Feature request: Add DSCP/ToS marking support

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Description

Feature request: add DSCP/ToS marking support.

- Add a CLI flag or config option to set DSCP value (e.g., 46 for EF)
- Apply to all outgoing DNS traffic: plain DNS, DoT, DoH, etc.
- Useful for QoS setups with Linux qdisc (CAKE, fq_codel) to prioritize DNS
- More reliable than port/process-based iptables/nftables marking

Thank you!

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