Re: [PATCH] send-email: Add config option for sender address

> The sender address, as specified with the '--from' command line option,
> couldn't be set in the config file.  So add a new config option,
> 'sendemail.from', which sets it.  One can use 'sendemail.<identity>.from'
> as well of course, which is likely the more useful case.
> 
> The sender address would default to GIT_AUTHOR_IDENT, which is usually the
> right thing, but this doesn't allow switching based on the identity
> selected.  It's possible to switch the SMTP server and envelope sender by
> using the '--identity' option, in which case one probably wants to use a
> different from address as well, but this had to be manually specified.
> 
> The docs are also fixed up somewhat.  If '--from' is specified (or the new
> sendemail.from option is used) then the user isn't prompted.  The default
> with no '--from' option (or sendemail.from option) is GIT_AUTHOR_IDENT
> first then GIT_COMMITTER_IDENT, not just GIT_COMMITTER_IDENT.
> 
> Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>