This is a merge of commit 9003bd8709c2b3f88e4ab34d3fc8e061a1beb08e, with the hash updated for TeX Live 2021. * gnu/packages/chez.scm (texlive-pdftex)[source]: Extract two more files. [propagated-inputs]: Add TEXLIVE-CM, TEXLIVE-ETEX, TEXLIVE-FONTS-KNUTH-LIB, TEXLIVE-HYPHEN-BASE, TEXLIVE-KPATHSEA, TEXLIVE-TEX-INI-FILES, and TEXLIVE-TEX-PLAIN.