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As discussed in testssl#2079, this commit adds "</dev/null" to calls "$OPENSSL s_client" that are intended to test whether a certain option is supported. This is done to prevent hanging in the case that the option is supported, a TLS server happens to be listening on the port to which s_client tries to connect, and the connection is successful.
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As discussed in #2079, this commit adds
</dev/nullto calls$OPENSSL s_clientthat are intended to test whether a certain option is supported. This is done to prevent hanging in the case that the option is supported, a TLS server happens to be listening on the port to which s_client tries to connect, and the connection is successful.