Implement RFC 3195

[leodido]

See https://datatracker.ietf.org/doc/html/rfc3195

BEEP frame example:

MSG 1 0 . 200 104
<34>1 2025-01-03T14:07:15.003Z mymachine.example.com su 12345 ID47 - 'su root' failed for user on /dev/pts/0
END

Line 1 is the BEEP header:
– MSG: Indicates the beginning of a message.
– 1: Message channel number.
– 0: Message sequence number.
– .: No immediate replies expected.
– 200: Payload size in bytes (depends on the message length).
– 104: Example length of the Syslog message.
Line 2 is the payload: The actual Syslog message in the format specified (e.g., RFC 3164 or RFC 5424).
Line 3 marks the end of the BEEP frame.