With SWWAF_LOG_REMOTE_URL set (syslog+udp, syslog+tcp or syslog+tls),
every line on stdout is also sent as the message of an RFC 5424 record,
octet-counted over TCP and TLS, from a bounded buffer that drops its
oldest line when full, so a slow or unreachable server holds up nothing.
Failed connections are retried with backoff; lines sent, dropped and
waiting are metrics. At a stop the lines still waiting get at most two
seconds. Standard library only: log/syslog writes only the older format.
Deviation: SWWAF_LOG_REMOTE_APP_NAME defaults to the host's name until
SWWAF_INSTANCE_NAME exists.
Model: opus-5-5
