Tell curl to follow redirects for commit-msg hook

An HTTP server may reasonably want to redirect e.g. http to https, so
use -L to instruct curl to follow such a redirect.

Change-Id: Ie8d9caee68330335fc1e915c5e87d9191f29ea65
diff --git a/Documentation/cmd-index.txt b/Documentation/cmd-index.txt
index 5637e80..a54803b 100644
--- a/Documentation/cmd-index.txt
+++ b/Documentation/cmd-index.txt
@@ -12,8 +12,8 @@
   $ scp -p -P 29418 john.doe@review.example.com:bin/gerrit-cherry-pick ~/bin/
   $ scp -p -P 29418 john.doe@review.example.com:hooks/commit-msg .git/hooks/
 
-  $ curl -o ~/bin/gerrit-cherry-pick http://review.example.com/tools/bin/gerrit-cherry-pick
-  $ curl -o .git/hooks/commit-msg http://review.example.com/tools/hooks/commit-msg
+  $ curl -Lo ~/bin/gerrit-cherry-pick http://review.example.com/tools/bin/gerrit-cherry-pick
+  $ curl -Lo .git/hooks/commit-msg http://review.example.com/tools/hooks/commit-msg
 
 For more details on how to determine the correct SSH port number,
 see link:user-upload.html#test_ssh[Testing Your SSH Connection].