title: How to switch off TLSv1.3 in gatling?
body: <p>I recently migrated from Gatling 3.3.1 to Gatling 3.4.0.
  As a result, everything works fine in my local machine, but crashes in k8s because of the following error:</p>
  <pre><code>    Couldn't execute warm up request https://gatling.io
      java.lang.IllegalArgumentException: TLSv1.3
      at sun.security.ssl.ProtocolVersion.valueOf(ProtocolVersion.java:187)
      at sun.security.ssl.ProtocolList.convert(ProtocolList.java:84)
      at sun.security.ssl.ProtocolList.&lt;init&gt;(ProtocolList.java:52)
      at sun.security.ssl.SSLEngineImpl.setEnabledProtocols(SSLEngineImpl.java:2081)
      ...
  </code></pre>
  <p>I migrated back to the working version.
  I assumed from <a href="https://github.com/gatling/gatling/issues/3927" rel="nofollow noreferrer">here</a>, that TLSv1.3 is switched on by default.
  I searched for the appropriate setting in gatling-defaults.conf, but did not succeed.
  I use Java 1.8 both locally and on remote k8s</p>
  <p>Please help me to resolve this issue!
  Thanks in advance!</p>