CLSA-2025-1743675732 avahi: Fix of 8 CVEs

CVE-2021-3468: handle termination event on avahi Unix socket to prevent infinite loop - CVE-2023-1981: prevent avahi daemon crash by emitting an error if the requested D-Bus service is not found - CVE-2021-3502: fix avahi-daemon crashing from NULL pointer assertions - CVE-2023-38469: reject...