connection: correctly filter messages on name takeover

connection: correctly filter messages on name takeover

If a name is taken over by an activator, we move messages that were
targetted at the this exact name over. However, we must make sure to leave
all other messages correctly queued on the source, so it can continue
using other names it might posess.

This fixes the filtering we apply on the messages itself, to no longer
leak them. Furthermore, it also applies proper filtering to the conn_reply
objects, so only matching objects are moved.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>