Pull ceph fixes from Ilya Dryomov:
"A fix for an edge case in MClientRequest encoding and a couple of
trivial fixups for the new msgr2 support"
* tag 'ceph-for-5.11-rc2' of git://github.com/ceph/ceph-client:
libceph: add __maybe_unused to DEFINE_MSGR2_FEATURE
libceph: align session_key and con_secret to 16 bytes
libceph: fix auth_signature buffer allocation in secure mode
ceph: reencode gid_list when reconnecting