/usr/share/jetty8/lib/ is in libjetty8-extra-java 8.1.19-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/jetty8/lib/annotations/
/usr/share/jetty8/lib/annotations/javax.annotation.jar
/usr/share/jetty8/lib/annotations/org.objectweb.asm.commons.jar
/usr/share/jetty8/lib/annotations/org.objectweb.asm.jar
/usr/share/jetty8/lib/jetty-ajp-8.1.19.v20160209.jar
/usr/share/jetty8/lib/jetty-annotations-8.1.19.v20160209.jar
/usr/share/jetty8/lib/jetty-client-8.1.19.v20160209.jar
/usr/share/jetty8/lib/jetty-plus-8.1.19.v20160209.jar
/usr/share/jetty8/lib/jndi/
/usr/share/jetty8/lib/jndi/javax.mail.jar
/usr/share/jetty8/lib/jsp/
/usr/share/jetty8/lib/jsp/jasper-el.jar
/usr/share/jetty8/lib/jsp/jasper.jar
/usr/share/jetty8/lib/jsp/javax.el.jar
/usr/share/jetty8/lib/jsp/javax.servlet.jsp.jar
/usr/share/jetty8/lib/jsp/javax.servlet.jsp.jstl.jar
/usr/share/jetty8/lib/jsp/org.apache.taglibs.standard.jar
/usr/share/jetty8/lib/jsp/tomcat-api.jar
/usr/share/jetty8/lib/jsp/tomcat-juli.jar
/usr/share/jetty8/lib/jsp/tomcat-util.jar
/usr/share/jetty8/lib/monitor/
/usr/share/jetty8/lib/monitor/jetty-monitor-8.1.19.v20160209.jar
/usr/share/jetty8/lib/test-jetty-servlet-8.1.19.v20160209.jar