- Modify patch texdoc_cnf.dif to ignore tlpkg/texlive.tlpdb as
kpathsea uses the ls-R files as well

- Correct obsoletes for new packages

- Scan *.def files as well for RequirePackage

- Add Requires to tex(epstopdf-base.sty) to fix package split
of texlive-epstopdf

- Skip *-dev packages from file dependendcy scanner as otherwise
we see doubling name space for some style files like amsmath.sty

- Add patch pythontex_p2top3.dif and a removes file to fully
switch pythontex packages of TeXLive to python3

- Update to TeXLive 2020
* Port patches
kpathsea_cnf.dif
latexpand_perl.dif
luaotfload_varfonts.dif
luatex_cnf.dif
musixtex_various.dif
* Delete patches not needed anymore as files have moved
tetex_scripts.dif
* Delete patche updmap-map_roboto.dif as fixed upstream
* Add new patches to catch moved files
texlive-scripts-extra_scripts.dif
texlive-scripts_scripts.dif
* Add new patch xetex_conf.dif to fit FHS location