3.13.0-30.55) is not available, but a newer one is (3.13.0-166.216). We redirected you there.
/usr/share/man/man1/debiandoc2texinfo.1.gz is in debiandoc-sgml 1.2.27.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/debiandoc-sgml.1.gz