/usr/share/doc/ is in libst-dev 1.9-3.1.
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/usr/share/doc/libst-dev/
/usr/share/doc/libst-dev/copyright
/usr/share/doc/libst-dev/notes.html
/usr/share/doc/libst-dev/examples/
/usr/share/doc/libst-dev/examples/proxy.c
/usr/share/doc/libst-dev/examples/Makefile
/usr/share/doc/libst-dev/examples/lookupdns.c
/usr/share/doc/libst-dev/examples/server.c
/usr/share/doc/libst-dev/examples/README
/usr/share/doc/libst-dev/examples/res.c
/usr/share/doc/libst-dev/examples/error.c
/usr/share/doc/libst-dev/fig.gif
/usr/share/doc/libst-dev/reference.html
/usr/share/doc/libst-dev/timeout_heap.txt
/usr/share/doc/libst-dev/st.html
/usr/share/doc/libst-dev/README.gz
/usr/share/doc/libst-dev/changelog.Debian.gz