libceph: turn on CEPH_FEATURE_MSG_ADDR2

Now that the client can handle either address formatting, advertise to
the peer that we can support it.

Signed-off-by: Jeff Layton <[e-mail]>
Reviewed-by: "Yan, Zheng" <[e-mail]>
Signed-off-by: Ilya Dryomov <[e-mail]>

include/linux/ceph/ceph_features.h

···
 	 CEPH_FEATURE_MON_STATEFUL_SUB |	\
 	 CEPH_FEATURE_CRUSH_TUNABLES5 |		\
 	 CEPH_FEATURE_NEW_OSDOPREPLY_ENCODING |	\
+	 CEPH_FEATURE_MSG_ADDR2 |		\
 	 CEPH_FEATURE_CEPHX_V2)
 
 #define CEPH_FEATURES_REQUIRED_DEFAULT	0