[WFCORE-4003] Upgrade xnio to 3.6.4
[WFCORE-4003] Upgrade xnio to 3.6.4

yersan/wildfly-core,bstansberry/wildfly-core,ivassile/wildfly-core,yersan/wildfly-core,jfdenise/wildfly-core,jamezp/wildfly-core,aloubyansky/wildfly-core,jamezp/wildfly-core,darranl/wildfly-core,bstansberry/wildfly-core,soul2zimate/wildfly-core,yersan/wildfly-core,jfdenise/wildfly-core,soul2zimate/wildfly-core,aloubyansky/wildfly-core,aloubyansky/wildfly-core,soul2zimate/wildfly-core,darranl/wildfly-core,jamezp/wildfly-core,luck3y/wildfly-core,ivassile/wildfly-core,darranl/wildfly-core,jfdenise/wildfly-core,ivassile/wildfly-core,luck3y/wildfly-core,bstansberry/wildfly-core,luck3y/wildfly-core