nilfs2: update mailing list address

This replaces the list address for nilfs discussion to linux-nilfs at
vger.kernel.org from users at nilfs.org.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

Documentation/filesystems/nilfs2.txt

@@ -28,7 +28,7 @@ described in the man pages included in the package.
 Project web page:    http://www.nilfs.org/en/
 Download page:       http://www.nilfs.org/en/download.html
 Git tree web page:   http://www.nilfs.org/git/
-NILFS mailing lists: http://www.nilfs.org/mailman/listinfo/users
+List info:           http://vger.kernel.org/vger-lists.html#linux-nilfs
 
 Caveats
 =======

MAINTAINERS

@@ -3882,7 +3882,7 @@ F:	drivers/net/ni5010.*
 
 NILFS2 FILESYSTEM
 M:	KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp>
-L:	users@nilfs.org
+L:	linux-nilfs@vger.kernel.org
 W:	http://www.nilfs.org/en/
 S:	Supported
 F:	Documentation/filesystems/nilfs2.txt