Merge branch 'km/send-email-remove-cruft-in-address'

* km/send-email-remove-cruft-in-address: git-send-email: allow edit invalid email address git-send-email: ask what to do with an invalid email address git-send-email: remove invalid addresses earlier git-send-email: fix fallback code in extract_valid_address() git-send-email: remove garbage after email address