Make index file locking code reusable to others.

diff --git a/Documentation/config.txt b/Documentation/config.txt
index cd56afd02122d4ae8c33edbb59928b8fe7071b25..c861c6ce17f79e78e5b0fb6f61a5419d143fd369 100644 (file)
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -70,6 +70,14 @@ core.preferSymlinkRefs::
        This is sometimes needed to work with old scripts that
        expect HEAD to be a symbolic link.
 
+core.logAllRefUpdates::
+       If true, `git-update-ref` will append a line to
+       "$GIT_DIR/logs/<ref>" listing the new SHA1 and the date/time
+       of the update.  If the file does not exist it will be
+       created automatically.  This information can be used to
+       determine what commit was the tip of a branch "2 days ago".
+       This value is false by default (no logging).
+
 core.repositoryFormatVersion::
        Internal variable identifying the repository format and layout
        version.