- update to 3.15:
* Several bugs that could allow the iperf3 server to hang waiting
for input on the control connection has been fixed
(ESnet Software Security Advisory ESNET-SECADV-2023-0002)
* A bug that caused garbled output with UDP tests on 32-bit hosts
has been fixed (PR #1554, PR #1556). This bug was introduced in
iperf-3.14.
* A bug in counting UDP messages has been fixed

JSON output on CentOS 6
* This maintenance release adds a -1 flag to make the iperf3
execute a single test and exit, needed for an upcoming bwctl
there is only one stream.
version developed at NLANR/DAST. iperf3 is a new implementation from scratch,
with the goal of a smaller, simpler code base, and a library version of the
functionality that can be used in other programs. iperf3 also a number of
features found in other tools such as nuttcp and netperf, but were missing
from the original iperf. These include, for example, a zero-copy mode and