[tex-live] Add LNCS to TeXLive

[Karl Berry]

    Package: ftp://ftp.springer.de/pub/tex/latex/llncs/latex2e/llncs2e.zip
    Info webpage: https://www.springer.com/computer/lncs?SGWID=0-164-6-793341-0

1) It needs to be available under a free software license.  I don't see
anything from them stating an explicit license on their own code.

2) It needs to be uploaded to CTAN.  It is better for everyone when
packages are available there.

If you want to contact them about these things, great.  --best, karl.