Merge branch 'mw/send-email'

* mw/send-email: send-email: Remove superfluous `my $editor = ...' send-email: 'References:' should only reference what is sent send-email: Handle "GIT:" rather than "GIT: " during --compose Docs: send-email: --smtp-server-port can take symbolic ports Docs: send-email: Refer to CONFIGURATION section for sendemail.multiedit Docs: send-email: Put options back into alphabetical order