Blog post on lzipped substitutes

[Ludovic Courtès]

Hello Guix!

I’ve published a post about the migration to lzip:

  https://gnu.org/s/guix/blog/2019/substitutes-are-now-available-as-lzip/

Thanks to the merge of ‘staging’ a few days ago, we have today ~20% of
the packages available as gzip + lzip, which gives some insight.

Thanks to Chris Marusich and Pierre Neidhardt for their feedback on
address@hidden on an earlier version of this post!

Ludo’.

PS: If you’re interested in joining address@hidden to review and
    propose blog articles, do let us know!