This was originally supported, however relative links to examples & templates made it fail.
Now files in the source tree are copied to the build-dir, with ".." replaced with "__"
to avoid having to mirror Blender's source-layout in the Sphinx build-dir.
Also skip uploading the built docs when an SSH user-name isn't passed to sphinx_doc_gen.sh
instead of aborting (so people w/o SSH access to our servers can use the shell-script).
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