Merge branch 'mm/send-email-fallback-to-local-mail-address'

Instead of maintaining home-grown email address parsing code, ship a copy of reasonably recent Mail::Address to be used as a fallback in 'git send-email' when the platform lacks it. * mm/send-email-fallback-to-local-mail-address: send-email: add test for Linux's get_maintainer.pl perl/Git: remove now useless email-address parsing code send-email: add and use a local copy of Mail::Address