/usr/share/jetty/ is in libjetty-extra-java 6.1.26-4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/jetty/lib/
/usr/share/jetty/lib/annotations-api.jar
/usr/share/jetty/lib/ext/
/usr/share/jetty/lib/ext/jetty-ajp.jar
/usr/share/jetty/lib/ext/jetty-annotations.jar
/usr/share/jetty/lib/ext/jetty-client.jar
/usr/share/jetty/lib/ext/jetty-html.jar
/usr/share/jetty/lib/ext/jetty-java5-threadpool.jar
/usr/share/jetty/lib/ext/jetty-rewrite-handler.jar
/usr/share/jetty/lib/ext/jetty-servlet-tester.jar
/usr/share/jetty/lib/ext/jetty-setuid.jar
/usr/share/jetty/lib/geronimo-jta-1.0.1b-spec.jar
/usr/share/jetty/lib/jsp-2.1/
/usr/share/jetty/lib/jsp-2.1/ant-launcher.jar
/usr/share/jetty/lib/jsp-2.1/ant.jar
/usr/share/jetty/lib/jsp-2.1/commons-el.jar
/usr/share/jetty/lib/jsp-2.1/el-api.jar
/usr/share/jetty/lib/jsp-2.1/jasper.jar
/usr/share/jetty/lib/jsp-2.1/jcl-over-slf4j.jar
/usr/share/jetty/lib/jsp-2.1/jsp-api.jar
/usr/share/jetty/lib/jsp-2.1/slf4j-api.jar
/usr/share/jetty/lib/jsp-2.1/slf4j-simple.jar
/usr/share/jetty/lib/jsp-2.1/tomcat-juli.jar
/usr/share/jetty/lib/jsp-2.1/xercesImpl.jar
/usr/share/jetty/lib/jsp-2.1/xmlParserAPIs.jar
/usr/share/jetty/lib/management/
/usr/share/jetty/lib/management/jetty-management.jar
/usr/share/jetty/lib/management/mx4j/
/usr/share/jetty/lib/management/mx4j/mx4j-tools.jar
/usr/share/jetty/lib/management/mx4j/mx4j.jar
/usr/share/jetty/lib/naming/
/usr/share/jetty/lib/naming/jetty-naming.jar
/usr/share/jetty/lib/naming/mail.jar
/usr/share/jetty/lib/plus/
/usr/share/jetty/lib/plus/jetty-plus.jar