/usr/share/jetty/lib/servlet-api-2.5.jar is in libjetty-java 6.1.26-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/jetty/lib/../../java/servlet-api-2.5.jar
/usr/share/jetty/lib/../../java/servlet-api-2.5.jar