www/jetty12: New port

Eclipse Jetty provides a highly scalable and memory-efficient web server and
servlet container, supporting many protocols such as HTTP/3,2,1 and WebSocket.
Furthermore, the project offers integrations with many other technologies,
such as:

• Asynchronous HTTP Server
• Standard based Servlet Container
• Web Sockets server
• Asynchronous HTTP Client
• OSGi, JNDI, JMX, JASPI, AJP support