Had to revert the previous commit ("remove remaining console.warn calls")

- as these are currently the only places where those config keys are honored
  (lint-check/warn-unknown-jsdoc-keys and lint-check/warn-jsdoc-key-syntax)

- to eventually remove this code, the call sides of Comment.parse() and
  Comment.parseNode() would need to handle those config keys and the logging
  of related errors
- to achieve this it should be placed in a dedicated function, like
  'Comment.log_jsdoc_errors(list_of_entries, log_options)'
- so that call sides don't have to duplicate this code (or even think about it)

- this reverts commit 2dcbf69bbcbae8e55c156deec57c8a42b1a6efee.