cifs: update MAINTAINERS file with reviewers

And also correct the URL for the project web site.
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>

MAINTAINERS

@@ -5055,12 +5055,15 @@ F:	include/linux/clk/
 F:	include/linux/of_clk.h
 X:	drivers/clk/clkdev.c
 
-COMMON INTERNET FILE SYSTEM CLIENT (CIFS)
+COMMON INTERNET FILE SYSTEM CLIENT (CIFS and SMB3)
 M:	Steve French <sfrench@samba.org>
+R:	Paulo Alcantara <pc@cjr.nz> (DFS, global name space)
+R:	Ronnie Sahlberg <lsahlber@redhat.com> (directory leases, sparse files)
+R:	Shyam Prasad N <sprasad@microsoft.com> (multichannel)
 L:	linux-cifs@vger.kernel.org
 L:	samba-technical@lists.samba.org (moderated for non-subscribers)
 S:	Supported
-W:	http://linux-cifs.samba.org/
+W:	https://wiki.samba.org/index.php/LinuxCIFS
 T:	git git://git.samba.org/sfrench/cifs-2.6.git
 F:	Documentation/admin-guide/cifs/
 F:	fs/cifs/