[pbs-devel] applied: [PATCH v2] add tracing init_cli_logger and deprecate old one

[Gabriel Goller]

Christian Ebner and I just noticed that previously all the output was on
stderr, because the `env_logger` prints everything to stderr
per-default [0]. This means that all the console output from
proxmox-backup-client, -manager, -debug, -file-restore, pxar, etc. is
now on stdout.

There is one test failing in pxar-bin, but I have a patch ready for that
already.

But will this cause more problems down the road? 
Do we rely somwhere on the stderr output? 
Should I change the tracing output to stderr as well?

[0]: https://docs.rs/env_logger/latest/env_logger/