BUG: wrdrd.tools.domain: Fix check_google_ functions
ENH: wrdrd.tools.domain: Add check_google_dkim
Merge branch 'develop' of ssh://github.com/wrdrd/docs into develop

* 'develop' of ssh://github.com/wrdrd/docs:
  BUG: wrdrd.tools.domain: Fix check_google_ functions
DOC: wrdrd.tools.domain: Add docstrings
CLN: wrdrd.tools.domain: lint
ENH: wrdrd.tools.domain: Add nameserver arg to nslookup