[PATCH] Update Documentation/git-config to reflect --local option.

Describe config file selection in git-config.
While the usage message of git-config shows --local,
the documentation page did not contain anything about that.

Signed-off-by: Florian Achleitner <redacted>
---
This was pointed out in http://thread.gmane.org/gmane.comp.version-
control.git/196326

 Documentation/git-config.txt |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-config.txt b/Documentation/git-config.txt
index 81b0398..bda8bbb 100644
--- a/Documentation/git-config.txt
+++ b/Documentation/git-config.txt

@@ -44,10 +44,13 @@ a "true" or "false" string for bool), or '--path', which 

does some
 path expansion (see '--path' below).  If no type specifier is passed, no
 checks or transformations are performed on the value.
 
-The file-option can be one of '--system', '--global' or '--file'
+The file-option can be one of '--system', '--global', '--local', or '--file'
 which specify where the values will be read from or written to.
 The default is to assume the config file of the current repository,
-.git/config unless defined otherwise with GIT_DIR and GIT_CONFIG
+.git/config unless defined otherwise with GIT_DIR and GIT_CONFIG.
+For read commands like '--get' the default is to search local, global, and
+system config files (in this order) for the requested value and stop after
+the first finding.
 (see <<FILES>>).
 
 This command will fail (with exit code ret) if:
-- 
1.7.9.5