Merge branch 'js/send-email'

* js/send-email:
send-email: add --confirm option and configuration setting
send-email: don't create temporary compose file until it is needed
send-email: --suppress-cc improvements
send-email: handle multiple Cc addresses when reading mbox message
send-email: allow send-email to run outside a repo

diff --cc Documentation/git-send-email.txt
Simple merge