Convert bitbucket.org repo links to github.org
Import new release docs
Import release docs
cherry-pick develop doc change
Update release docs
Update docs
Import docs from 2019.9.0 release branch
import-release for 2019.3.2 Manually re-apply changes to upc-hybrid.md since the release.
docs/upc-hybrid.md: Link the online GEX version table
update http links to https
add missing document