connection: Fix timeout

KDBUS_ITEM_REPLY_TIMEOUT have to be sent to src_id.
kerneldoc: remove unused ENOTCONN
namespace: spare one format variable in dev_set_name()
util: fix typo
identify anon inode as [kdbus-memfd]
test: use bool instead of int
export namespace-global message sequence number (ABI break)
allow to set and query connections and memfds a human-readable names (ABI break)
pool: remove debug function
namespace use 64 bit message seqnum
kdbus, endpoint: abort if device_register fails

If device_register() fails then jump to exit to clean things up and
return.

Signed-off-by: Djalal Harouni <tixxdz@opendz.org>