====== UO Protocol 0x73 ======

===== Ping message (2 bytes) =====

This is sent by the client to ping the server, and by the server to ping the client.

<code>
Offset Type     Name             Description
------ -------- ---------------- ------------------------------
 0000  BYTE     cmd
 0001  BYTE     seq              ping's value (usually 0x00)
</code>