Make `r` and `F` behave as `S L` when replying to a message from a mailing list

[Denis Bitouzé]

Hi,

I've just been told that when I reply (`r` or `F`) to a message from
a mailing list, the `To` is the original message sender's address
instead of the mailing list address, the latter being in the `Cc` field.

It appears that it should be enough to use `S L` to get the expected
behavior (the mailing list address in the `To` field, nothing in `Cc`),
but I'd like a unique keybinding for all the "reply" actions.

Hence my question: how could I make `r` and `F` behave as `S L` when
replying to a message from a mailing list?

Thanks in anticipation.
-- 
Denis