Merge branch 'sb/doc-config-submodule-update'

gitster · gitster · commit d5eec90970d7 · 2017-09-29T11:23:44.000+09:00
* sb/doc-config-submodule-update:
  Documentation/config: clarify the meaning of submodule.&lt;name&gt;.update
diff --git a/Documentation/config.txt b/Documentation/config.txt
@@ -3085,10 +3085,14 @@ submodule.<name>.url::
 	See linkgit:git-submodule[1] and linkgit:gitmodules[5] for details.
 
 submodule.<name>.update::
-	The default update procedure for a submodule. This variable
-	is populated by `git submodule init` from the
-	linkgit:gitmodules[5] file. See description of 'update'
-	command in linkgit:git-submodule[1].
+	The method by which a submodule is updated by 'git submodule update',
+	which is the only affected command, others such as
+	'git checkout --recurse-submodules' are unaffected. It exists for
+	historical reasons, when 'git submodule' was the only command to
+	interact with submodules; settings like `submodule.active`
+	and `pull.rebase` are more specific. It is populated by
+	`git submodule init` from the linkgit:gitmodules[5] file.
+	See description of 'update' command in linkgit:git-submodule[1].
 
 submodule.<name>.branch::
 	The remote branch name for a submodule, used by `git submodule
