in plugin/server_audit/server_audit.cc [2424:2438]
static void update_syslog_facility(MYSQL_THD thd __attribute__((unused)),
struct SYS_VAR *var __attribute__((unused)),
void *var_ptr __attribute__((unused)), const void *save)
{
ulong new_facility= *((const ulong *) save);
if (syslog_facility == new_facility)
return;
mark_always_logged(thd);
error_header();
fprintf(stderr, "SysLog facility was changed from '%s' to '%s'.\n",
syslog_facility_names[syslog_facility],
syslog_facility_names[new_facility]);
syslog_facility= new_facility;
}