Previously there was no way to tell if an incoming packet was
incorrectly formatted. The new function SInPacket.isValid()
can be called after decryption/decompression to determine if
the packet wasn't decrypted and/or decompressed properly.
* Added "valid" attribute to SInPacket.
* Decryption routine unsets "valid" if input buffer is not divisible by 16.
* Decompression routine unsets "valid" on receiving zlib error.
When the client program exits it does not end its connection,
which causes the server to leave the connection active
until it times out.
* Provide the disconnect event in the client destructor.
* For easier testing, example 3 client no longer loops infinitely.
ottona
rna88