send-email: further document missing sendmail aliases functionality

Sendmail aliases[1] supports expansion to a file ("/path/name") or
pipe ("|command"), as well as file inclusion (":include: /path/name"),
however, our implementation does not support such functionality.

[1]: https://www.freebsd.org/cgi/man.cgi?query=aliases&sektion=5

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-send-email.txt b/Documentation/git-send-email.txt
index b48a76432030e7c72b9d75a6b879b6e614458859..e6d466e9a5a8ce0bdb1d795e43ae3dd7415105f4 100644 (file)
--- a/Documentation/git-send-email.txt
+++ b/Documentation/git-send-email.txt
@@ -396,6 +396,9 @@ sendmail;;
        contain a `"` symbol are ignored.
 *      Line continuations are not supported: lines that start with
        whitespace characters, or end with a `\` symbol are ignored.
+*      Redirection to a file (`/path/name`) or pipe (`|command`) is not
+       supported.
+*      File inclusion (`:include: /path/name`) is not supported.
 *      Warnings are printed on the standard error output for any
        explicitly unsupported constructs, and any other lines that are not
        recognized by the parser.