/usr/lib/jvm/java-7-openjdk-amd64/man/man1/itweb-settings.gz is in icedtea-netx 1.2-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/jvm/java-7-openjdk-amd64/man/man1/../../jre/man/man1/itweb-settings.1.gz