Documentation requirements for LogBack (default logger)

With the noted library use in LICENSE of "logback: which uses LGPL, have we done enough? After reading the advice in URL below, we address #2, but can we address #1?

https://softwareengineering.stackexchange.com/questions/86142/what-exactly-do-i-need-to-do-if-i-use-a-lgpl-licenced-library/86158

as noted logback is default logger as per docs:
https://github.com/apache/incubator-openwhisk/blob/925500cf8d34bb75bebd077ea057af236eba0b01/docs/logging.md

Default Logging Provider

OpenWhisk uses Logback as default logging provider via slf4j.

Logback can be configured in the configuration file logback.xml.

Besides other things this configuration file defines the default log level for OpenWhisk. Akka Logging inherits the log level defined here.

If we can show another logger over the same Interface this could satisfy #1