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e6ace6fcf4
Add a new AUDIT logging level (-5) between PANIC (-4) and NOLOG (shifted to -6) across C++, PHP, and Perl loggers. AUDIT entries use code 'AUD' and syslog priority LOG_NOTICE. They record who changed what, from where, for monitors, filters, users, config, roles, groups, zones, states, servers, storage, events, snapshots, control caps, and login/logout. AUDIT entries have their own retention period (ZM_LOG_AUDIT_DATABASE_LIMIT, default 1 year) separate from regular log pruning. The log pruning in zmstats.pl and zmaudit.pl now excludes AUDIT rows from regular pruning and prunes them independently. Critical safety: the C++ termination logic is changed from 'if (level <= FATAL)' to 'if (level == FATAL || level == PANIC)' to prevent AUDIT-level log calls from killing the process. Includes db migration zm_update-1.39.1.sql to shift any stored NOLOG config values from -5 to -6. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>