Get rid of insecure Transport Layer Security (TLS) Ciphersuites|OPC UA Standard|Forum|OPC Foundation

OPCUA 1.04 specifies TLS ciphersuites that are considered weak for various reasons.

For a security point of view such ciphersuites shall be avoided and replaced by one that is recommened for state-of-the art products.

Current mandatory ciphersuits:

https://reference.opcfoundatio…..cs/6.6.160 
TLS_DHE_RSA with AES_nnn_CBC_SHA256
https://ciphersuite.info/cs/TL…..BC_SHA256/ 

https://reference.opcfoundatio…..cs/6.6.159 
TLS_RSA with AES_256_CBC_SHA256
https://ciphersuite.info/cs/TL…..BC_SHA256/ 

Here is a list of recommended ciphersuites:

https://ciphersuite.info/cs/?s…..t=sec-desc 

Additionally, mbedTLS is dropping support for such weak ciphersuites in future versions:

https://github.com/Mbed-TLS/mb…..ssues/8170