[Xmldatadumps-l] IMPORTANT: Changes to abstracts and siteinfo-namespaces jobs

[Ariel Glenn WMF]

These jobs are currently written uncompressed. Starting with the next run,
I plan to write these as gzip compressed files. This means that we'll save
a lot of space for the larger abstracts dumps. Additionally,only status and
html files will be uncompressed, which is convenient for maintenance
reasons.

If anyone has a strong objection to this, please raise it now. There's a
ticket open for it: https://phabricator.wikimedia.org/T178046

Thanks!

Ariel