user-manual: Explain what submodules are good for.

diff --git a/upload-pack.c b/upload-pack.c
index 0e881c85b5cc5e128904d5a149634c077b62644d..fe96ef15c43fa6e3f8f947f84ddce3c498e82859 100644 (file)
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -62,7 +62,7 @@ static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
        return safe_write(fd, data, sz);
 }
 
-FILE *pack_pipe = NULL;
+static FILE *pack_pipe = NULL;
 static void show_commit(struct commit *commit)
 {
        if (commit->object.flags & BOUNDARY)