add DEVELOPER makefile knob to check for acknowledged warnings

diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
index 904dafa0f7070fc438f138393a3b356542ae04d9..9ec6b3cc17fd776b16f6410cf88c708831d4bca3 100644 (file)
--- a/Documentation/git-commit.txt
+++ b/Documentation/git-commit.txt
@@ -13,7 +13,7 @@ SYNOPSIS
           [-F <file> | -m <msg>] [--reset-author] [--allow-empty]
           [--allow-empty-message] [--no-verify] [-e] [--author=<author>]
           [--date=<date>] [--cleanup=<mode>] [--[no-]status]
-          [-i | -o] [-S[<key-id>]] [--] [<file>...]
+          [-i | -o] [-S[<keyid>]] [--] [<file>...]
 
 DESCRIPTION
 -----------
@@ -154,7 +154,11 @@ OPTIONS
 -s::
 --signoff::
        Add Signed-off-by line by the committer at the end of the commit
-       log message.
+       log message.  The meaning of a signoff depends on the project,
+       but it typically certifies that committer has
+       the rights to submit this work under the same license and
+       agrees to a Developer Certificate of Origin
+       (see http://developercertificate.org/ for more information).
 
 -n::
 --no-verify::
@@ -314,7 +318,9 @@ changes to tracked files.
 
 -S[<keyid>]::
 --gpg-sign[=<keyid>]::
-       GPG-sign commit.
+       GPG-sign commits. The `keyid` argument is optional and
+       defaults to the committer identity; if specified, it must be
+       stuck to the option without a space.
 
 --no-gpg-sign::
        Countermand `commit.gpgSign` configuration variable that is