* new recipe: dblatex
This is a python script to convert DocBook to LaTeX.
It is another (optional) dependency of LilyPond.
Note: this depends on texlive and can therefore not be built as long as that is disabled.
* dblatex: split texlive requirements along the collection subpackages (as in #6229), add fig2dev
* remove --root to fix relative package_base path
also fix trailing whitespace
