Update Jetty to 11.x

[tesshucom]

We may need to change the source.

Release notes

Sourced from apache-jsp's releases.

11.0.0

Eclipse Jetty 11.x Highlights

• Jetty 11.x has a minimum Java requirement of Java 11.
• Jetty 11.x modules are proper JPMS modules with module-info.class.
• Jetty 11.x supports the following technology specs (from the Jakarta EE 9 effort):
  • jakarta.servlet - 5.0.0
  • jakarta.servlet.jsp - 3.0.0
  • jakarta.servlet.jsp.jstl - 2.0.0
  • jakarta.el - 4.0.0
  • jakarta.websocket - 2.0.0
• Jetty 11.x is the first major version of Jetty to support the jakarta.servlet namespace.
  Use Jetty 10.x for the older (now outdated) javax.servlet namespace.

Important Changes

• Classic jetty logging facade has been replaced with slf4j-api usage
• There is no longer a jetty-distribution, use jetty-home with a proper ${jetty.base} instead.
  See: Operations Guide: Architecture
  • New demo jetty-start module exists to replace the old demo-base functionality.
• Remove jetty-all uber artifact
• Managing Configuration within a WebAppContext has a new API.
  (They are now self ordering and do not require knowledge of Jetty internals to use successfully)
• Complete WebSocket refactoring, those using the Jetty APIs or embedded-jetty will need to update their code.
  • Support for WebSocket over HTTP/2 (client and server)
• Jetty HttpClient has been improved.
  • Supports dynamic protocol upgrade (http/2 and http/1.1).
• Session management has been refactored as well.

Related #781 .

[tesshucom]

#838