Turn Github links into relative links
requested to merge freetrader/bitcoincash-upgrade-specifications:fix/old_links_to_github_in_may2020_spec into master
There were some links in the main spec document which pointed to Github. This turns them into relative links to this repository.
This is just a hotfix - there are probably other instances in the specs that need similar touching up, but right now the May 2020 issue is pressing.