Merge branch 'mm/push-social-engineering-attack-doc'

Doc update on fetching and pushing.

* mm/push-social-engineering-attack-doc:
doc: mention transfer data leaks in more places

diff --cc Documentation/config.txt
Simple merge

diff --cc Documentation/git-fetch.txt
Simple merge

diff --cc Documentation/git-pull.txt
Simple merge

diff --cc Documentation/git-push.txt
Simple merge