Upgrade iperf3 to 3.16

[mfeit-internet2]

TODO:

• Upgrade package in pScheduler
• Add sane limits for number of streams in toolkit
• Stress this change in the release notes

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ESnet (Energy Sciences Network) is proud to announce the release of
iperf-3.16.

This version of iperf3 introduces a major change in the way that
parallel tests (specified with the -P/--parallel flag) are
handled. iperf3 now uses a separate thread (pthread) for each test
stream. Generally multiple threads will use multiple CPU cores (if
available), so this change will likely improve iperf3's ability to do
higher-speed tests, particularly on 100+Gbps paths. This version has
recorded transfers as high as 148Gbps in internal testing at ESnet
over 200Gbps paths.

This release also includes a few other minor changes for OpenSSL
support. More information on those changes can be found in the
iperf-3.16 release notes, which are contained in the RELNOTES.md file
in the distribution.

iperf-3.16 should be fully backward-compatible with prior iperf3
releases, that is, iperf-3.16 clients and servers should
interoperate correctly with all 3.x clients and servers.

The source code for iperf-3.16 is available at:

https://downloads.es.net/pub/iperf/iperf-3.16.tar.gz

SHA256 hash:

cc740c6bbea104398cc3e466befc515a25896ec85e44a662d5f4a767b9cf713e

iperf3 is freely-redistributable under a 3-clause BSD license.  More
information can be found in the LICENSE file inside the source
distribution.

Additional documentation: https://software.es.net/iperf

Source code and issue tracker: https://github.com/esnet/iperf

Discussion forums: https://github.com/esnet/iperf/discussions

Reporting security issues: [[email protected]](mailto:[email protected])

User questions can go to the iperf users list (which is more-or-less
shared between iperf2 and iperf3):

[[email protected]](mailto:[email protected])

Mailing list information and archives can be found at:

https://lists.sourceforge.net/lists/listinfo/iperf-users

The mailing list for iperf3 development is:

[[email protected]](mailto:[email protected])

To see the list archives or join the mailing list, visit:

http://groups.google.com/group/iperf-dev

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[mfeit-internet2]

Release Notes:

NB: This should be a toolkit release note, not pScheduler.

The default limit configuration limits parallel streams for throughput tests to 15 for trusted hosts and 6 for all others.