Merge branch 'dk/send-email-avoid-net-smtp-ssl-when-able'

"git send-email" now uses Net::SMTP::SSL, which is obsolete, only when needed. Recent versions of Net::SMTP can do TLS natively. * dk/send-email-avoid-net-smtp-ssl-when-able: send-email: Net::SMTP::SSL is obsolete, use only when necessary