CIFS: Implement follow_link for SMB2

that allows to access files through symlink created on a server.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>

diff --cc fs/cifs/cifsglob.h
Simple merge

diff --cc fs/cifs/inode.c
Simple merge

diff --cc fs/cifs/link.c
Simple merge

diff --cc fs/cifs/readdir.c
Simple merge

diff --cc fs/cifs/smb2file.c
Simple merge

diff --cc fs/cifs/smb2inode.c
Simple merge

diff --cc fs/cifs/smb2misc.c
Simple merge

diff --cc fs/cifs/smb2ops.c
Simple merge

diff --cc fs/cifs/smb2pdu.c
Simple merge

diff --cc fs/cifs/smb2pdu.h
Simple merge

diff --cc fs/cifs/smb2proto.h
Simple merge