Update to upstream version '1.9.3.5'
with Debian dir e280cf963a2e629a9e3dbbd88c2c9139579e2e41

Update to upstream version '1.9.3.5'
with Debian dir 5402fa3786615144aa0705f8c8d173d0653a8608

Lintian complains about doc-base-file-references-wrong-path. On the one hand we
should be able to remove /usr/share/doc at any time and install necessary
documentation in another place but we can't specify a different path in the
doc-base file? Is a doc-base file even useful in Debian nowadays? I doubt so,
so let's remove the doc-base file.