DLPX-25998 TCP congestion control is inadequate
Reviewed at: http://reviews.delphix.com/r/34808/

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  .\" source.  A copy of the CDDL is also available via the Internet at
  .\" http://www.illumos.org/license/CDDL.
  .\"
  .\"
  .\" Copyright (c) 2012, Joyent, Inc. All Rights Reserved
! .\" Copyright (c) 2013 by Delphix. All rights reserved.
  .\" Copyright 2018 Nexenta Systems, Inc.
  .\" Copyright (c) 2016-2017, Chris Fraire <cfraire@me.com>.
  .\"
  .Dd February 6, 2018
  .Dt IPADM 1M
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  .\" source.  A copy of the CDDL is also available via the Internet at
  .\" http://www.illumos.org/license/CDDL.
  .\"
  .\"
  .\" Copyright (c) 2012, Joyent, Inc. All Rights Reserved
! .\" Copyright (c) 2013, 2017 by Delphix. All rights reserved.
  .\" Copyright 2018 Nexenta Systems, Inc.
  .\" Copyright (c) 2016-2017, Chris Fraire <cfraire@me.com>.
  .\"
  .Dd February 6, 2018
  .Dt IPADM 1M
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  .Sy + Ns | Ns Sy -
  syntax can be used to add/remove values from the current list of values on the
  property.
  The property name can be one of the following:
  .Bl -tag -compact -width "smallest_nonpriv_port"
+ .It Cm congestion_control
+ The default congestion-control algorithm to be used for new connections
+ .Pq TCP .
  .It Cm ecn
  Explicit congestion control
  .Pq Cm never Ns / Ns Cm passive Ns / Ns Cm active
  .Pq TCP .
  .It Cm extra_priv_ports