EnableSSLHostnameVerification is new parameter from r12.8SP6.
What is the default value for EnableSSLHostnameVerification?
Release : 12.8.06 and higher
The default value is "False"
If you would like to use the parameter, so you can Uncomment the parameter from SSLCipherConfig.properties file.
//Uncomment the below property for enabling host name verification during backchannel SSL communication