New draft: draft-agl-tcpm-sadata-00

That draft specifies the stack changes to enable the current, mostly userspace, ObsTCP. My experimental version of the kernel patch comes in at just 150 lines of additional code. Also, it's currently working between my laptop and my home computer through two NATs. The major omission, currently, is that the packets aren't signed. I'm hoping that TCP-AO will take care of that at some point in the future. For now, I'm moving ahead with encryption only.