Set up logger instance in base constructor

[hschletz]

Fixes #270

Only tested with IMAP backend. Changes to other backends are trivial, but untested.

[brknkfr]

Seems okay/to work for me. Only checked with IMAP backend.

[chris8205]

can confirm, that this is one of a possible solution / fix...
please push new version to get compatibility with v20 to v32

[chris8205]

@violoncelloCH can you merge this and release it pls

[K-os]

I implemented basically the same fix before seeing this MR and have it running on my instance without any problems. So I can confirm this is correct.

[VVD]

Can you create new version - 2.2.0?

[stefangweichinger]

Is there a release somewhere to download and unpack? Instead of manually patching. Thanks.

[tflidd]

Is there a release somewhere to download and unpack? Instead of manually patching. Thanks.

It's just here in the github code, if you use this directly, it should work. To get a release, a maintainer is needed, check out:
#273 (comment)