[tldoc] tl17 doc: synctex news

[Staszek Wawrykiewicz]

Done for texlive-pl* r.44343
If it is not too late, please add:
< \item{Serbian:} \OnCD{texmf-dist/doc/texlive/texlive-sr}

> \item{Serbian:} \OnCD{texmf-dist/doc/texlive/texlive-sr}
> \item{Spanish:} \OnCD{texmf-dist/doc/texlive/texlive-es}

As for .po files, the message:
"(not verified: gnupg not available)" is missing for all languages. Can be 
that be included, instead of hard coded in tlmr?

Thanks,

-- 
Staszek Wawrykiewicz
staw at gust.org.pl