Update for iperf-3.15.

Author: bmah888

docs/conf.py

@@ -52,10 +52,10 @@
 # built documents.
 #
 # The short X.Y version.
-version = '3.14'
+version = '3.15'
 # The full version, including alpha/beta/rc tags.
 
-release = '3.14'
+release = '3.15'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

docs/news.rst

@@ -1,6 +1,20 @@
 iperf3 Project News
 ===================
 
+2023-09-14:  iperf-3.15 released
+--------------------------------
+| URL:  https://downloads.es.net/pub/iperf/iperf-3.15.tar.gz
+| SHA256:  ``bdb77c11f72bce90214883159577fa24412013e62b2083cf5f54391d79b1d8ff``
+
+iperf 3.15 fixes that could cause an iperf3 server process to hang
+waiting for input on the control connection. For more information,
+please see:
+
+https://downloads.es.net/pub/iperf/esnet-secadv-2023-0002.txt.asc
+
+This version of iperf3 also includes several other minor bug fixes,
+which are summarized in the release notes.
+
 2023-07-07:  iperf-3.14 released
 --------------------------------
 | URL:  https://downloads.es.net/pub/iperf/iperf-3.14.tar.gz