Description

A representation of the format description event.

FDE binlog payload is structured as follow:

Common to both 5.5 and 5.6:
    19 bytes for common v4 event headers
    2 bytes (uint16) for binlog version
    50 bytes for server version string (padded with '\0's)
    4 bytes (uint32) for created timestamp.  Note that this value may be
        unpopulated.
    1 byte (uint8) for total header size, where total header size =
        common header size + extra headers size
    1 byte per event type for event's fixed length data size.  Note that
        unknown events does not have an entry.
5.5 Specific:
    27 bytes for events' fixed size length (one uint8 entry per event
        type, except unknown events)
5.6 Specific:
    35 bytes for events' fixed size length (one uint8 entry per event
        type, except unknown events)
    1 byte (uint8) for checksum algorithm
    4 bytes for checksum