send-email: allow aliases in patch header and command script outputs
Interpret aliases in:
- Header fields of patches generated by git format-patch
(using --to, --cc, --add-header for example) or
manually modified. Example of fields in header:
To: alias1
Cc: alias2
Cc: alias3
- Outputs of command scripts specified by --cc-cmd and
--to-cmd. Example of script:
#!/bin/sh
echo alias1
echo alias2
Signed-off-by: Remi Lespinet <remi.lespinet@ensimag.grenoble-inp.fr>
Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>