memcpy calls and explicit setting of fields to 0) - this code is just bad.
The only functional change should be that the SBBSecho product code (0x12FF)
and major/minor version number is now added to headers of type 2+ packets
generated by SBBSecho. Type 2 and 2.2 packets will have just 0xff for the
product code and the SBBSecho major version number in the product "serial
number" field (as is the common practice). I guess everyone's using type 2+
packets these days? You don't get 5D addresses with 2+, but SBBSecho doesn't
really do anything with 5D addresses anyway. <shrug>