Compress backups

[cfoellmann]

I think it would be nice if backups were compressed.
In my single test it was about 20% smaller. Every bit counts, right?

[umputun]

not a bad idea, but I'd preffer to have it optional to keep back compatibility

[cfoellmann]

definitely optional.
No update must break existing configs.

I was thinking if a conf file is a good idea or working with ENVs ? The python script has a lot of features that can not be applied at the moment.

But low maintenance is a big plus in a project