chrony-knowledge-patch

# chrony 4.7–4.8 Knowledge Patch Baseline: chrony through 4.6.x. Covered range: chrony 4.7 through 4.8, plus the included operational and deployment guidance. ## Reference index | Reference | Topics | | --- | --- | | [core-configuration.md](references/core-configuration.md) | Upgrade requirements, daemon and client behavior, source options, packet controls, logging, service integration | | [reference-clocks.md](references/reference-clocks.md) | RTC, PHC, PPS, GPS, gpsd, reachability, locking, startup, and time scales | | [hardware-timestamping-and-ptp.md](references/hardware-timestamping-and-ptp.md) | Hardware timestamping, interleaved NTP, NTP-over-PTP, transparent clocks, PHCs, and virtualization | | [network-time-security.md](references/network-time-security.md) | NTS client state, authentication diagnostics, server setup, policy compatibility, and verification | | [monitoring-and-troubleshooting.md](references/monitoring-and-troubleshooting.md) | `chronyc`, exporter metrics, source selection, transport errors, client records, and network recovery | ## Using this patch - Check the upgrade notes before carrying an older configuration or build setup forward. - Use the quick references below for common decisions, then load the indexed topic file for constraints and edge cases. - Treat examples as fragments: retain the access controls, source diversity, measured offsets, and platform-specific paths required by the deployment. ## Breaking changes and upgrade checks ### C...