Consider locales encoding

[imobachgs]

Problem

See #987.

Solution

• The encoding should be included in the locale, although at this point we always use UTF-8 (check localectl list-locales).
• I adapted the web UI to ignore the encoding (it is only interested in the language).

Updating the spec file

I updated the spec file according to the latest changes of cargo_vendor:

* cargo_config is no longer created - it's part of the vendor.tar now
    * You can safely remove lines related to cargo_config from your spec file

* multiple cargotoml files can be specified and share a single vendor.tar
    * If multiple cargo.toml files are present update does not work. This is a known
      limitation of the process

* cargo_audit is now part of cargo_vendor, meaning you don't have to configure it separately

Testing

• Manually tested using a branch in OBS.

[coveralls]

coverage: 74.852% (-0.01%) from 74.865%
when pulling f153650 on use-locale-encoding
into 8ca724d on master.

[dgdavid]

Draft: So far, it looks good to me 👍

[dgdavid]

LGTM 👍 However, you might want a review from another colleague for the Rust part. Up to you 😉

[imobachgs]

LGTM 👍 However, you might want a review from another colleague for the Rust part. Up to you 😉

Thanks a lot! I just wanted @mvidner to, please, have a look as our language expert :-)