K 10 svn:author V 3 rrs K 8 svn:date V 27 2015-12-16T00:56:45.555738Z K 7 svn:log V 330 First cut of the modularization of our TCP stack. Still to do is to clean up the timer handling using the async-drain. Other optimizations may be coming to go with this. Whats here will allow differnet tcp implementations (one included). Reviewed by: jtl, hiren, transports Sponsored by: Netflix Inc. Differential Revision: D4055 END