This issue concerns integration of a modified version of the Wildfly HTTP client library which supports:

• client-side and server-side handler versioning 
• a modified interoperability protocol (handshake) for establishing agreement (for purposes of backward comparability) for the following versions:
  • Java EE /Jakarta EE version
  • client-side and server-side handler version

A key point of integration is in the Undertow request handler chain which controls the HTTP request/response messages used during the interoperability handshake.