headers reorganized to contain a 24 bit seqno and a 24 bit ackno, R got tossed, check lost a bit too.
alternate transport of ackno implemented.
Adding a callback for Vinod.
Inching towards an implementation.
tying the knots: ackno now in the header
disabling selective acknowledgment code for now
code clean ups and renaming
Debug and configure issues.
client and server should use the same mode.
hostname now settable in the config file, and all steg modules obey that setting.
fixes ackless non-persist mode bug
The merge of ackless into the master.
More verbose invalid ack messages  so we can fix them.