When do the "tox docs" or "make html" in docs directory below error
is thrown in the middle of building docs and there are two broken links
in html output:
ERROR: Unknown target name: "restructuretext".
ERROR: Unknown target name: "conf override".
Change-Id: Icf4bc1b1bfbbbf2b3c2912bddd34dd5371b20afc
Closes-bug: #1510580
5a325c0798