Clean up broken links

This includes:
* Update Jira links to lf-broadband.atlassian.net
* Remove references to CLA
* Fix a typo
* Simplify Gerrit login URL
* Add new ignores for problematic URLs

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: If1ddf63a26419e8b17c7a5c213746d27d4b11cc5
31 files changed