It looks better by default with the RTD theme, Bro syntax highlighting
is supported well enough, and I think will be more more consistent
with the literalinclude usages, so being able to drop the extra Sphinx
extension seems good.
I added the $path to the create_stream() calls inside doc/ as well.
* origin/topic/jsiwek/bit-1324:
Allow logging filters to inherit default path from stream.
BIT-1324: #merged