[PATCH v2] docs: link to gitsubmodules

[Brandon Williams <bmwill@google.com>]

Add a link to gitsubmodules(7) under the `submodule.active` entry in
git-config(1).

Signed-off-by: Brandon Williams <bmwill@google.com>
---
 Documentation/config.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index ab641bf5a..340eb1f3c 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -3327,12 +3327,13 @@ submodule.<name>.ignore::
 submodule.<name>.active::
 	Boolean value indicating if the submodule is of interest to git
 	commands.  This config option takes precedence over the
-	submodule.active config option.
+	submodule.active config option. See linkgit:gitsubmodules[7] for
+	details.
 
 submodule.active::
 	A repeated field which contains a pathspec used to match against a
 	submodule's path to determine if the submodule is of interest to git
-	commands.
+	commands. See linkgit:gitsubmodules[7] for details.
 
 submodule.recurse::
 	Specifies if commands recurse into submodules by default. This
-- 
2.18.0.rc1.244.gcf134e6275-goog