[Rd] FYI: daily R source tarballs from ETH: *.xz instead of *.bz2)

[Martin Maechler]

A quick notice for anyone who uses cron-like scripts to get
R source tarballs from the ETH  R/daily/ s:

I've finally switched to replace *.bz2 by *.xz which does save
quite a bit of bandwidth.

Currently, you can see the 2 day old *.bz2 (and their sizes) and
compare with the new  *.xz one  (sorted newest first):

  https://stat.ethz.ch/R/daily/?C=M;O=D


Best,
Martin