pack and unpack problems

[Justin Johnson]

Would you mind explaining this for me?  What do you mean by check
alignment?  Sorry, this is kinda new for me.  In the meantime I'll go
read my orielly tcp book.  :-)

Thanks.

> PS. Better use '!xxLxx8c' cause N is network order 4-byte long
> 
> PPS. xxNxxH8 = 1+1+4+1+1+8 = 16, so check alignment!
>