* sources/console.c: remove unused variable

Signed-off-by: rkhapov <r.khapov@ya.ru>

* sources/config.c: backend_connect_timeout_ms

To remove const from sources/backend.c + format fixes

Signed-off-by: rkhapov <r.khapov@ya.ru>

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Signed-off-by: rkhapov <r.khapov@ya.ru>
Co-authored-by: rkhapov <r.khapov@ya.ru>