Illumos/gate c12492c — usr/src/uts/common/inet tcp_impl.h tcp.h, usr/src/uts/common/inet/tcp tcp_input.c tcp_output.c
11546 Track TCP round-trip time in nanoseconds
Portions contributed by: Cody Peter Mello <cody.mello at joyent.com>
Portions contributed by: Brandon Baker <bbaker at delphix.com>
Reviewed by: Jason King <jason.king at joyent.com>
Reviewed by: Robert Mustacchi <rm at joyent.com>
Reviewed by: Dan McDonald <danmcd at joyent.com>
Approved by: Richard Lowe <richlowe at richlowe.net>
UnifiedSplitRaw